i have recently started the same project that you are thinking about with the mounts from chevy duty and there catalog ( witch can give alot of good ideals for alternate part sources if read properly) its not to bad the stock steering will absolutly have to go for a mid 70s 1/2 ton power set witch is better any way as far as exhaust i went with summits block hugger headers they fit nicely between the frame rails. happy hunting i hope to talk to you later