Ok cool I have a friend that I just made a deal with to trade my 454 and 3 speed tranny for his 350 and 4 speed tranny. Now I have a little more money to play with and a few more questions.
Mods:
Is the 350 going to drop right in or am I going to have to have the driveshaft modified? What should I do about the gear ratio?
Engine:
Should I get an aftermarket/performance intake? If so, what are some suggestions? Exhaust? There's nothing wrong with the current exhaust, should I mess with it at all - I don't completely understand how backpressure works and don't wanna mess it up.

I know I'm a newb with a lot of questions but I appreciate the help, guys!