Heads were delivered today.

Pluses
They look really nice... a very nice finished look
Bowls and exhaust ports look perfect
Very little cleanup left to do OOTB

Minuses
Need a little cleanup to match the intake ports
Stamped locks so those will have to go
Doesnt look like any of the holes are helicoiled so hopefully that wont be an issue

I've ran 906's, Edelbrocks and 440 Source Stealth so far and would say the new ProMaxx Heads look very promising at an unbelievable price point.

Once I get the intakes port matched and clearance the pushrod holes a bit for good measure I'll get to my engine builder to see what he thinks.

I see 5.90's in my future