Best BB bang for your buck?

I have the following parts if you want to stick with budget factory/inexpensive stuff. Edelbrock Performer 383, 383 steel crank standard, will clean up at .010-.010, one very nice 67 casting 915 head, I also have a pair of the HP manifolds correct to fit a bb in an A body. The C body driver's side and a b body passenger's side. I am probably going to go with headers because my build just keeps getting more radical as time goes on. Let me know if you are interested, I will give you a great deal since I am not going to use this stuff. It is just taking up space. I trade a lot too.