....yes the LT1's have aluminum heads {'93 to '97 in Firebirds/Camaro's}. LS1's are '98 to '02 in Firebirds/Camaro's}. Vette's first had LS1's in '97, heads & block aluminum. Not sure if $700 to $1000 is a good deal {is this price for LT1's or LS1's???}. Check; local salvage yards, e-bay, etc... Did you price an LS1 out of a truck or SUV like StuCool mentioned??? I'm not sure but they might come with iron blocks with would mean c-h-e-a-p-e-r ...... Also there is a thread that's active right now tilted 'What's the cheapest way to make 500 HP'. Please READ IT..... So is your total budget $2600??? bill