LS1 or traditional SBC

[N2TRUX]

Originally Posted by Prostreet 72

I.......From what I have been told by some builders, the stock LS1 with a carb swap will make 375-390hp out of the box. To take my tired old 350 andrebuild it to the same hp, I will spend more than I am on this new engine.....

Yeah, that's true. But if you keep the efi and do a cam/heads swap you can run 500/hp with the a/c on.

[killer71]

Originally Posted by N2TRUX

Yeah, that's true. But if you keep the efi and do a cam/heads swap you can run 500/hp with the a/c on.

Exactly...fuel injection is the only way in my book, but to each his own!

[Gray Ghost]

Originally Posted by N2TRUX

Yeah, that's true. But if you keep the efi and do a cam/heads swap you can run 500/hp with the a/c on.

And still get stellar gas mileage!!

[lowbucktruck]

Originally Posted by Prostreet 72

I hear you guys loud and clear, but here is the deal. I have 2 kids under the age of 3, two classic trucks, a house payment, daycare payments, street driven car payments etc. I would love to have the truck roll out with a LSX engine with a 6 speed manual trans in it, but I have to take baby steps with this truck. When I built the Prostreet truck, it was just my wife and I. Now a I have a couple more responsibilitys to take care of first before the truck. So that is the reason I need to go with the 350 trans. I have it on the floor of the garage. Later I would love to trade up to one of the later transmissions. But first I have to start with this one.

Thanks a ton!

Chris

Dude, I hear you. I have a newborn baby at home myself. And with a project truck and a budget, you have to spend your money wisely.
I haven't actually done the LS/Gen III swap myself, but I have researched it quite a bit, sourced the engine and trannys locally and talked to guys like us that have done this swap.
If you have a good TH-350 sitting in your garage, I can understand your preference to use what you already have. Just giving you options. I have found used 4L60e trannys locally for around $500.

[jablack]

I have 4 month old twins, a 6 year old son, and two 8 year old girls, I know how hard it is. Build it how you want it in my opinion.

Let me know where I can get one of those engines when you're ready. I've been wanting to rip one open myself.

[ulakovic22]

Just buy the new block that lets you build an SBC with LS heads and intake. It uses all SBC internals with LS H/C/I.

[Kid]

Originally Posted by americanmusc1e

any advice for someone like me wanting to do a LQ4 swap into my '70, what harness did you use???

I used a custom harness built by "Speartech" & am very happy with it. Top notch quality wire /terminals/protective wrap. John uses "hi-temp" wire loom & asbestos wrap where needed.

[Chevymann1968]

Originally Posted by ulakovic22

Just buy the new block that lets you build an SBC with LS heads and intake. It uses all SBC internals with LS H/C/I.

Yep!!! but it uses the LS pistons instead of the old school gen 1 pistons!!!!


I would like to know the price of teh bare block and the complete engine!!!!

[ulakovic22]

Due to the valve angles, yes, I think you have to run LS style pistons, but I have heard that you can run either all LH pistons and be ok and I know they sell SBC pistons for 15, 18 and 23 degree heads. I'm not sure how available large bore LS pistons are and also pistons that will work with something less than 6.125 which is a LS rod I believe. Wiseco probably has something that will work out of their ProTru catalog.