best setup for low money?

As above, if you know how to remove/install an engine head, then shaving .060" or so off of the head will be a very good start. Then I would put on a larger exhaust pipe and muffler, at least 2-1/4" pipe. Both are relatively low $$ to do.

Also as above, what are you going to do with the car? Drive it on the street? Or drag race? Or ??