I would call around and get the hourly rates.. All the shops are good. I would bet most of the shops would send the injectors out to be tested. Since its specialized equipment.

Total performance knows the M20 engine well, they have built our chumpcar team 2 engines that have run endurance races that have gone up to 24 hours. We have been racing the car for 4 years. And the engine we lost were due to cooling failures, water pumps, hoses, radiators.. nothing to do with engine build.

I know the other shops have done well with boosted and S52 engines.. No one knows the S14 (E30 M3)engine better than Cars and Concepts.