Hello my name is Hunter I am buying a 1971 Plymouth Duster 340 with the 4 speed manual and wanted to know where to find parts, things I should look out for, and some ideas to put a little more muscle into her

 

Welcome! I’d get it in excellent (not good, excellent) mechanical shape before I looked for power upgrades. First thing I’d do if it’s running well is check (and then recheck) the electrical. Ma Mopar loves electrical gremlins.

Pictures of car?

 

Welcome to the site!