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IF you own a salvage yard then hands down LS1,i built mine on a budget of $1800 including alot of new parts including a new block.As far as the conversion i think it was easier then my tpi swap i did afew years back.Anything i swap for now on will be a ls1/ls6/or ls2.I know alot of the guys on here run the 6 speed but i opted for the 700r4 since i already converted to it,i think it runs great with it and bolts right up with a crank adapter and c5 flexplate.
i'd consider going with the LT1, stroke it out to a 383 stroker, and forget the carb - keep it as a fuel injection unit.
The LT1 was a real nice motor and if you turn it into a 383 stroker it only gets better
Why go backwards? The LT1 is great as a fuelie - especially if you use the far superior cast-iron heads. Of course, if you have one around, an LS1 sounds good...
Last edited by I'm Batman; Aug 1, 2006 at 11:45 PM.
Stock 92-97 LT1 w/auto, around 230-240rwhp stock. Stock 98-02 LS1 w/ auto, 280-290rwhp stock. Plus 80lbs lighter, MUCH stronger bottom end and much more room for additional HP with cam upgrade and worked heads.
If it was me, I would go auto with a 3600rpm stall, your car would run 11s with a cam/exhaust on an 01-02 LS1. If you do go T56, make sure you get a T56 from an LS1, LT1 and LS1 bellhousings, clutch slaves etc are all different. Your best bet is to just pull the whole lump out of a wreck and stick it in your car. Even if you put the LS1 in completely stock and change nothing on it you will run mid 13s out of the box. Also hood clearance is not an issue as with SBC and BBC.
Only reason I am not going LS1 is because I want my car to appear mostly stock and traditional, thats why I am doing a 383 or 408 sbc. I have an LS1 in my other car and NOTHING matches their power and reliability. Mine makes 550rwhp, thats 650+ at the crank on a STOCK motor.
The gto's have a front sump oil pan ,you would need to swap pans,and pickup tube.Other then that itll work.Theres a member on here whos doing a gto motor swap in his.