Ok, as Birdsprinter pointed out... I'm going to assume you have a Chevy 383.

You should be ok with the front springs, as the small block is lighter than the larger Pontiac motor. (otherwise you'd need to change the front springs)

You'll need Camaro Motormounts, you'll have to modify the fuel line, some of the wiring (basically just making sure the length will be right for the starter, Alt. etc...)

And besides Tranny issues, it should be pretty straght forward. Not really a lot of work. Especially if you have some good manuals to help out...

Let us know how it goes. The way I look at it is... your still saving one more Bird from a far worse fate of a date with the crusher!

Brett - 67 Drop Top 455!