[Tom Cimino]

Ford racing makes a closed push on breather cap with a nipple for a hose to the air cleaner. Part # M-6766-G302. It's available from Summit for $7.25. I'm pretty sure it is made to fit the filler tube on the intake manifold. I'm running a similar, but open breather # M-6766-B302
That and the pcv and hose to the carb base should be what you need. No need to change the smooth valve covers.