A hard ash will be more of a 70's sound, the originals were swamp ash. If you want a 50's sound, a set of Brown Sugars or Boss's will do it, for the 60's, look to the Yardbirds or Country Boy's. If you are going with a maple neck, you will have a brighter tone, especially with a hard ash body. You could also look at the Piledriver for a Broadcaster tone.
Warmoth make very good wood parts, I have several guitars and even more necks. I just got a strat one with the SRV carve, and love the feel. I am thinking of getting a clapton maple to see how it feels too.