I'll add with the goal of keeping (near) stock fit, the Edelbrock RPM or Stealth heads seem the best choice.

Starting with 906 heads the closest aluminum replacement would be the open chamber (88 cc) Edelbrock head. Closed chamber and quench would be nice but that depends on the compression ratio and other aspects of the engine.

I think the assembled Ed head with valves and springs is the best deal. With a moderate cam, the supplied springs should be fine. The valves are good also.

It is worth getting the valve job and valve to guide clearance checked/corrected by a good shop IMO.

The Promaxx heads are not the same company as Pro Max carbs in Indianapolis.
The company used to be called Patriot Heads.

The Promaxx heads are imported(Chinese) castings, with American guides installed over here, and the heads are finished and assembled at their facility in Alabama.

The only head that's like an edelbrock head for a bb mopar, that's made in the USA.....is the edelbrock head.

There are a few other USA made heads, but they aren't really "direct replacement" type heads.

Shameless plug...... I have some new-in-box, prepped, bowl blended Sidewinder heads listed in the for sale section.

Csk & Rapid Robert-thanks for the info on the Promaxx heads; was unaware of all info you shared. Got some misinformation on Promaxx.
Cab_Burge-that info helped me to go w/ heads assembled. As stated, looking for easy swap w/ minimal downtime.
Will be doing some research here on Moparts into Edelbrocks & Stealth heads. Thanks to all for your input!!