hey guys... so i was driving my 95 formula and it was making a minor noise then by the end of the day it sounded horrible... i took it to a nearby mechanic and he told me that i blew my engine

i put it on the road with tags and title the morning the engine blew and by 3 it was done.... the mechanic suggests the guy before me raced the crap out of it then put the stock parts back on it then sold it to me... it only has 72000 miles.. the only mods on it are drilled and slotted rotors... im pissed... anyway i was thinking,,, what would i have to do to put a ls1 in my car??? and do u no where i could buy a lt1 or maybe ls1 with low miles and in good running condition? thanks alot Luke