What is the most economical way to performance build a 5.0 L (305) Chevy small block?

The 305 has potential !! I have had several, that ran very well ! I may be off track , but i found that if you change the rear gear to a lower gear and make a few mod's to the 305, you have a sleeper !! My 84 z 28 ( 305 ) would pull the front wheels off the ground with a 4:11 rear gear. Go for it !!!! Good luck !!