360 414 build heads????????????

Skip the W5 due to there being a pricey head and a bit hard to find. They are out there! But often costly to own. I forgot to mention the "Air Wolf" head. I can not remember the porter here in the North East. I think it Dr.Jay? (Ugh! Crap! I can't remember now.)
He ports them out really well. I'd run them over a W5 because there cheaper and flow well. Not quite a W5 flow but close enuff to seriously consider them as a replacement head worthy of thought.

If you can find a set of W5's inexpensively, that would be great if they didn't need a ton of work to use.