New to me! 1974 K5 Blazer!!
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RE: New to me! 1974 K5 Blazer!! - 9/20/2008 7:01:40 PM
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TripleBlackBlazer
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You didn`t mention the roll cage. Is it welded to the frame? You got a free Hi-Lift with it!!!
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RE: New to me! 1974 K5 Blazer!! - 9/20/2008 7:14:51 PM
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swartlkk
Posts: 14308
Joined: 5/1/2005
From: Waterloo, NY
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Roll cage is standard (fiberglass top and all). The jack looks like it has never been used and I am not sure if it was original...
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Kyle-
2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto
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RE: New to me! 1974 K5 Blazer!! - 9/20/2008 8:46:15 PM
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myol blue4x4
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From: War In (Warren) OH
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Looks like another great project. Hope all goes well with it! So what are your plans for this one Kyle? A restoration or like a resto-mod?
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-Gary
*1995 Brilliant Blue Metallic Blazer*
http://www.cardomain.com/ride/2680990
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RE: New to me! 1974 K5 Blazer!! - 9/21/2008 3:44:43 AM
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willjones
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From: Wilmington, NC
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How much did that beauty set you back?
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RE: New to me! 1974 K5 Blazer!! - 9/21/2008 7:27:48 AM
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jimbosv650
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Congrats It would be kind of mind blowing to see that thing with a four banger swapped in for fuel efficiency.
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RE: New to me! 1974 K5 Blazer!! - 9/22/2008 6:52:18 AM
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swartlkk
Posts: 14308
Joined: 5/1/2005
From: Waterloo, NY
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Tried to respond to this last night, but seems the site is back to its crappy ways.
Anyway, I will be removing the interior this week to see how much work I have in front of me!
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Kyle-
2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto
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RE: New to me! 1974 K5 Blazer!! - 9/24/2008 5:08:38 AM
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swartlkk
Posts: 14308
Joined: 5/1/2005
From: Waterloo, NY
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Well, Monday night I got the whole back end stripped down and cleaned up as best I could with a vacuum. Someone decided to cut a hole in the bed to swap out the sending unit in the tank so I will need to get a patch panel for that (junkyard). I also got the passenger seat out and floor stripped down. The seats were not original and there are quite a few extra holes in the floor that I will need to weld up before I am all said and done, but all in all it is quite clean. Surface rust is all that is there.
Instead of putting carpet down inside, I think I am just going to throw down some bed liner on both sides of the floor (inside and underside) and call it a day. That way I will not have to do anything but prime and cover with bed liner!
I was able to partially identify the motor as well.
Casting code: 3970010 > 1969-1979 350CID V8 2 or 4 bolt, car, truck, vette
Stamping code: V0715CMB > V- Flint (engine), 07- July, 15- 15th day, CMB- 350, 4brl, 155HP/250lbft, F, LM1, Nova/Camaro
VIN code: 15N653303 > 1- Chevrolet, 5- 1975, N- Norwood, 653303- production sequence of vehicle VIN
Since it is a car engine, I am not sure if it will be a 4-bolt main. I may just build up my other engine and drop it in, then do something else with this one... Not sure yet.
Other bad news is that none of the seats are original. The back seat looks to have come from another Blazer so that is good, but the front seats are from something different entirely. Here are some pics of the progress from Monday night:
  
Last night I did a carb cleaning and general tune up. I did not mess with the plugs or wires, but I adjusted the timing and carb jets so it was running better. Started it this morning (38*F outside) and it sat up on the high idle for a few seconds. Tweaked the throttle and it dropped down to normal idle and stayed.
The carb is a Rochester QuadraJet with 7044206 and L3 (c) FA on the side. Comes back as a 1974 Federal Emissions Chevy Automatic transmission carb.
Now I need to get an HEI distributor for this thing. I will not mess around with points. For the time being, I will probably just steal the distributor from my Chevelle.
< Message edited by swartlkk -- 9/24/2008 5:11:13 AM >
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Kyle-
2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto
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RE: New to me! 1974 K5 Blazer!! - 9/24/2008 7:33:10 AM
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rriddle3
Posts: 1313
Joined: 12/22/2006
From: Fort Worth,Texas
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quote:
ORIGINAL: swartlkk
I was able to partially identify the motor as well.
Casting code: 3970010 > 1969-1979 350CID V8 2 or 4 bolt, car, truck, vette
Stamping code: V0715CMB > V- Flint (engine), 07- July, 15- 15th day, CMB- 350, 4brl, 155HP/250lbft, F, LM1, Nova/Camaro
VIN code: 15N653303 > 1- Chevrolet, 5- 1975, N- Norwood, 653303- production sequence of vehicle VIN
Whoa, a 350 rated 155hp w/ 250lbft of torque! Engines sure have moved on from 30 years ago, huh? Might as well put a 4.3L in it! 
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2002 Blazer LS 4dr 2WD Auto Trans
Hypertech PP III Programmed
Flowmaster 50 Series Delta Flow Muffler, C6 Corvette Exhaust Tip
TYC Elegante carbon fiber tail lights
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RE: New to me! 1974 K5 Blazer!! - 9/24/2008 7:37:37 AM
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swartlkk
Posts: 14308
Joined: 5/1/2005
From: Waterloo, NY
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What you have to realize is that was not gross crank HP after 1972. This motor was actually rated at 185HP, but when tested with all the accessories, exhaust system, etc. The transition happened in 1972 where the industry went from SAE Gross to SAE Net measurement. General rule from a few articles I have found was that SAE Net was ~80% of SAE Gross which would put this engine in the 190HP range which lines up with the minimum HP figures I found for the block casting code.
Besides, it is not that right now, nor will it ever be again! And there is NO WAY that a 4.3L is finding its way between the frame rails of this truck!! LOL
Here is a quote I found about the LM1 motor in the 1974 Camaro:
quote:
California equipped Camaros came with a special "LM-1" 350 rated at 160 hp
It looks like this was the same motor carried over into 1975 after they dropped the Z28 trim level (and motors), being the highest performance motor you could purchase in the Camaro!
Here is another quote about HP levels in the mid 1970s:
quote:
power ratings were now net as opposed to the prior gross ratings. Net power ratings were taken from the engine crankshaft as before, but now all accessories had to be attached and operating, and all emissions equipment and a full production exhaust system had to be in place. These power-robbing additions — along with stringent new emissions laws — were instrumental in creating the vastly smaller power figures found in subsequent cars
< Message edited by swartlkk -- 9/24/2008 8:08:22 AM >
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Kyle-
2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto
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RE: New to me! 1974 K5 Blazer!! - 9/24/2008 8:59:23 AM
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rriddle3
Posts: 1313
Joined: 12/22/2006
From: Fort Worth,Texas
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Yeah, I discovered the 80% rule awhile back. It puts some of the old muscle cars we drove back in the late ''60s and early ''70s into perspective for today. Even going by Net HP, the smog certs from the mid ''70s onward really put the hurt on power up until just a few years back when techno started catching up.
_____________________________
2002 Blazer LS 4dr 2WD Auto Trans
Hypertech PP III Programmed
Flowmaster 50 Series Delta Flow Muffler, C6 Corvette Exhaust Tip
TYC Elegante carbon fiber tail lights
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RE: New to me! 1974 K5 Blazer!! - 9/25/2008 12:23:51 AM
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Chevy Lover
General Tech Moderator
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Congrats on the "new" truck Kyle.
The original jack was a crank style stored on the left inner fender under the hood.
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Give a man a fish and he will eat for a day, teach a man to fish, and he will sit on a boat drinking beer for a life time
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RE: New to me! 1974 K5 Blazer!! - 9/25/2008 4:42:31 AM
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swartlkk
Posts: 14308
Joined: 5/1/2005
From: Waterloo, NY
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Thanks Rob! I have already done quite a bit of work on it, mainly stripping things down getting ready for some sheetmetal.
I knew the jack was not the factory jack, but it looks as though it was installed (and never used since) way back when. Some lithium grease and WD40 and it looks new again and works great!
Rob, do you know if the roll bar was a factory option? Earlier in this thread I meant to say that it looked factory, not necessarily that it was standard. This truck has 3 point seat belts in the front which I am not sure if they came like that from the factory... The only seat belts that match the SPI label are the outer ones in the back which are charcoal gray. The rest are all black.
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Kyle-
2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto
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RE: New to me! 1974 K5 Blazer!! - 9/25/2008 3:41:14 PM
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BrianMichaels1
Posts: 118
Joined: 3/16/2007
From: Dallas, TX
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Nice to see an old Blazer being saved instead of it biodegrading or being recycled into 15 Kias. Congratulations, nice!
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RE: New to me! 1974 K5 Blazer!! - 9/26/2008 10:45:37 PM
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Chevy Lover
General Tech Moderator
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I''m not aware of a factory roll bar. Factory seat belts were simple lap belts.
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Give a man a fish and he will eat for a day, teach a man to fish, and he will sit on a boat drinking beer for a life time
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RE: New to me! 1974 K5 Blazer!! - 9/27/2008 11:09:35 AM
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swartlkk
Posts: 14308
Joined: 5/1/2005
From: Waterloo, NY
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Only place that gave me the impression that the roll bar could have been factory was THIS.
quote:
New was the factory padded roll bar
And I have found references to the "family" roll bar. The picture below is from a 1973 dealer brochure. Does not mean that these were factory equipped, but they were available when new. The folks over at ColoradoK5 report that there were some of the 1st gens with factory rollbars that had the option shown on the SPI label in the glovebox. The same things were offered up through 1975 from what I have found.
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Kyle-
2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto
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