for over 2,000 heads of all makes. You'll find 3 references to Holley's SBF Windsor Systemax heads although it's a large file and not easily manipulated.
Still, and although JDC (Joe D.) would be a better responder here as head porting expert, I don't think you can achieve your hp goal with UNPORTED Holley heads. 449hp/302CID = almost 1.5 hp per CID. That's a tall order even for a very well prepped engine.
But ported and with the right induction/exhaust system.....sure, you goal is achievable IMHO.