Find the motor mounts, X members and everything else that is diffrent between the V6 cars and the V8 cars, and change all that over, after that it will bolt in. You will probably want to get the heavier V8 springs. Also, ya can learn alot from the local auto part store, tell them that you need brake rotors for your '91 Camero, when they ask V8 or V6, ask if there are 2 part numbers, if there are, you know you have diffrences in the front end, so you may want to further investigate that, you may also need front end parts. But all should be redily available at a junk yard.