what kind of heads would you use?

Well, I say get the Indybrocks for what you are looking to do. Keep the valve train less exotic. If not I would consider trading you my full ported Eddy's for a set of CNC'd 360-2's If you go with Eddy's let me know I may have a used set of Harland sharp 1.6's I'd sell. Your Friend
Lonnie