Guys'n Gals, I finally located a set of CORRECT 66 RIBBED nailhead valve covers for a customers project.
I AM SELLING this set that will fit other year Nailheads however, these are FACTORY correct for 64-65 '425' 2X4 optioned motors:
1370315 - LH 64-65 425, 2x4 less crankcase vent, ie: closed circuit.
1366222 - RH 64-65 425, 2x4 cover
$425 SHIPPED to any lower 48!
PayPal preferred.
Please get in line here first then PM me your intent.
Wheelz, Tampa Bay