how much?
You will spend more money on coverting the car than selling it and getting one that has an ls1 in it. I think it will cost no less than 6k and that is if you drop in a stock ls1. If you want LT, heads/cam, all bolt on you will look at 10k if not more.
truthfully.....it would be a whole lot smarter just to buy a car that is already powered by an LS1......because after you go throught the 6-10 grand just to put the motor in think about how much age and ware are already on an eleven year old car. If i were you i would either sell it and put that money towards an LS1 camaro/trans am....or just use your money to upgrade the LT1 you already have....just my thoughts....Good luck


