I never mentioned money until it was time to pick up my stuff.....then I asked " what do I owe you ?".
Reputation and experience.......not just with MoPars , but the wide variety of interesting stuff he has put his hands on told me he knew his business.
I did have a ball park figure in mind for pricing on this last build , and he was anywhere from right on to a touch less for all I had done.
If I were having him assemble it , then it would be more important to have a " MoPar guy " , but for machining , it is right or not.
For porting , knowing what a certain head likes is more of a factor I suppose.
But I was very happy with the numbers so far.
The dyno will tell the rest of the tale , but I am not worried in the least.
Reputation and experience ( how long he has been in the business ) are primary for any high end work I need done.