This is were I have been buying my valves. It may be worth a call or do some research on their site to see what they offer.

http://www.ebay.com/itm/230612099884?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time