need advise in a 318

hey there, this is my first mopar build (allways WAS a bow tie guy) i was doing a 74 valiant but after pulling back the roof fabric to find all the cancer arround the windows, i found a 71 dart so now the valiant is a good donor. I have a 318 in the valiant (not original so i do nt know what year the motor is) the dart has a 318 minus the intake, and i have a 318 out of a 1980 camper van, my question is is there some web site that i can cross the block numbers to find out which one is the best to build. another question is being on a budget what can you do to get a decent amount of power eg, i want to rebuild it so my idea is bore .30, new cam (any sugestions), port the heads (depending on how much, and what to do), that kinda stuf, any ideas would be good.

here is one more, is there a 4spd auto, or 5 spd standard for a 318, i dont ever remember seing one.

thanks guys, as i say im new to mopar.