He was probably fine working on that other stuff he's done for original poster.
But this isn't easy and he got way over his head.
Did he give you a written estimate? Is he a licensed shop? Don't pay him over $1000 original estimate. Should be lot less. Call Bureau of Automotive Repair.
Needed to go to place familiar with Mopar header installs or a very talented muffler shop with lots of experience with hot rod custom installs.
