You talk about not trusting a crate motor because you don't know who built it yet you say find a shop and have someone build it for you. It is the same thing. Finding a "good" shop is a crap shoot too and no difference than buying a "crate" motor. Sure I have a shop machine my motors and was a crap shoot finding the right one at first but I can double check the machining before assembly to make sure they are "good". Now if you know the person that built your motor personally then that is a different animal.
Chuck