I'm not saying he needs to spend millons on a head, it is what it is.

Are you ASSuMEing he has a super duper PORTED head off someones race engine? In stock form a 383, in a car weighing almost 4000 lbs, overcammed is going to be less than impressive, especially with 7.5 compression...

Hopefully joining that group SuperRob mentions will garner him some help , hopefully parts wise and finding a capable shop that can build that engine right.