as i said i'm wonderin whitch so you guys or gals think is better a pre-90's built smallblock or an LS1-7??

 

The LS-series of engines are arguably the best available now. I wouldn't put a carb on one, though.

But, "better" is impossible to answer, because use, budget, down-time, etc., aren't included in your criteria.

 

what are you wanting to do? street strip or both? How much of a budget? MPG or performance?

 

LS1 go for it. I estimate about $5k for a used one installed with trans, harness and accessories.

 

$5k would get you about half way there, especially if you're talking installed.

 

really? I thought that you could get a good pulled unit for about $2500. with a hawks k-member and maybe headers that would put you at $4k. Throw in a good shifter, exhaust tie-in, and fuel pump, be around $4500

what else am I forgetting? Ive thought about this swap, but I didnt think it was that expensive.

 

Lowest I've seen is $2500 with auto tranny, and that was an oddball. $4k for LS1/T56 is more typical.

K-member is around $500 w/o a-arms. Conversion mounts are cheaper, but you'll need to modify the front crossmember if you keep AC. You still need a rear crossmember. Headers are $800 for the "standard" set. Good custom exhaust work is expensive. You need a different fuel pump. Gages don't work as-is.

It can be done cheap, but to do it right is going to run you more.

Understand I'm not putting down the LSx swap - after all, I have one in progress.

 

I sisn't mean put a carb on a ls motor but what i meant was do i continue building my 407ci stroker or transplant an ls7 t56 combo? i want the car to be a street,roadcourse,drag car. my budget is non existant,and my down time will be as long as it takes to do it right!!!

 

Then without a doubt, LS7.

 

Old thread I know but the thought came to me, Do you guys think putting a LS series engine in a 3rd gen is kinda the same as putting an ls1 in a non-GM or is it acceptable??

 

Two years later and your still thinking about it? Putting an LS motor in a 3rd gen is competely acceptable. Why wouldnt it be? There are a lot of people on here that have that swap.