motor question
 

I have a 1985 chevy silverado short wheel base. It has the orginal 305 in it now. I have a 1991 350 small block that i'm going to be installing in it. The questions i have are. 1. Will all my accessories off of my 305 (ie a/c, altenator , pulleys, etc) fit on my 91 block. Also what type of headers would i use. The motor cam out of a 1991 chevy 1500. It orginally had a serpitine belt on it.

y not keept the serpitine belt set up?