408 CI Lq9 (LS style) into a 68 GMC C15 - Sure

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Grendel

Member
Joined
Apr 8, 2010
Messages
23
Location
Coldville, NH
So, we redid a 70 GMC C15 that my father bought new in 71 as a hold over.

Over the years, it's been our shop truck for the auto restoration business. It's one of the reasons I get along so well with JFG455. We're both car nuts with fathers who were car nuts.

Long story short, JFG455 talked me into an LS style motor... I really wanted power AND reliability.

So I did an LQ9 iron block, a Callies Magnum crank, connecting rods and pistons to make it 408ci and added a nice cam, LSA blower heads and JFG455 build headers for it.

Thing is, this is RRR.... this truck is not really a Rat Rod. Why am I posting it here? Well, I wanted a certain look to the truck. Modern, but old school.

So I added a radial mount 3.4L whipple blower to it with a big old dominator throttle body sitting on top. I think it looks decently old school... eventually, I will hide all the wire in copper pipe and move the coils off the valve covers.

So, if you think an LS motor will ruin your look, you can make them different.

Ive done dual carb intakes, 2" cog belt drives, etc.

I know, RRR is not really about looks, but who do you think you're really kidding? Function over form, sure... but we all fall in love with that form first ;)
 

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A side shot, with the 2" cog belt drive that had to come off... every time the blower would kick into max boost, it would rip the alternator off the head.
 

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You guy are going to force me into the 21st century. Those LS engines provide power and economy. The truck looks fantastic. Would like to see more shots of it.
 
This is an LS2 (that got a different intake) with a dual carb intake, 2 500 CFM Carters and a hood scoop.

Note the intake's just sitting on a bare block with heads. I ended up with a different intake set up, but still like the look of this one. You can get separate timing controllers too.
 

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You guy are going to force me into the 21st century. Those LS engines provide power and economy. The truck looks fantastic. Would like to see more shots of it.

Sure. First pic is what we started with, then paint in my shop, then some interior work and few more drive way shots.

JFG455 and I did most of the build. This is after I paid 2 other folks to paint it, it just wasn't right, so I did it myself.
 

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