NJ914Guy,
Here's a shop in Mt Laurel,
http://www.iserviceimports.com. Fred is excellent with D tronic injection. He has the Bosch analyzing equipment for the 914s. He's fair and does a good job. I believe he does PPIs. The other guys are right too. There's alot of experience on this board with people who are willing to share. Some of us have been playing with 914s way too long and can't help but have some knowlegde rub off.
Good luck in your search.
Dave