I looked into swapping a v8 into a Isuzu truck in the past. All I found on the net were kits to swap in the 8 into S-10 trucks. The kits are fairly complete. Also Are you thinking of retaining fuel Inj? If so look into Painless wiring, go to their site for info. They even had harnesses to bypass the Alarm/coded key features on late model LT-1's.
Jeg's carries all the items, or you could source them out yourself. Start by getting a Jeg's cat in the mail, look up what you will need off the donar. Late model cameros are fairly economically priced if you search for a wrecked one, and swap in everything. Good luck, you doing a good do-able swap, with lots of products to choose from to help you complete it.