B-block cylinder heads?

The cheapest ones are the iron heads completely redone. But, if you take a set of cores and do everything they need you will be spending at least $1000. That's using stainless valves and name brand (Not MP) springs, keepers and locks. Add porting, and you have a set of irons that cost the same as a set of alumiuynm Edelbrocks. But are heavier, arent closed chamber, and flow maybe slightly better (depending on the porter). It's money. You will spend it either way. The next step is Indys or the MP Edelbrocks. The MP ones are easier to bolt on because they use a straight spark plug, so they fit most common domed pistons and headers out there. I wouldnt use you 63s at all. Either find a set of 516s cheap and do them (but I would limit the exh valve size to 1.74) or buy a set of edelbrocks.