What are you looking for in the way of background? They've been building small block chevy motors for the circle dirt track for about 20 years. They do everything from a regular street car rebuild to as wild as you want. Reputation is pretty good but customer service can be lacking at times. They're also a grandfather Crower dealer (they don't have to meet requirements to remain a dealer) if that tells you anything about how long they've been in the business.
Overall, I give them a B. They built the motor that's in my Talon if its worth anything to you.

My engine is currently at Precision. All who are there have been very helpful and open with their experience and information. They also seem to be very good about only doing what is truely necesarry unless you ask for more. As far as time frames they have waited on me much more than I have waited on them (But my engine has been there all winter).

I guess we will see how good they really are once I'm up and running.

ryan was my old room mate and he defiantly knows his shit when it comes to the 4G63 and everything chevy. Chris who also works there does amazing port work, and knows everything there is to know about making a high horsepower motor.

a buddy of mine had his motor rebuilt there with over sized pistons and a ported head and they did a really nice job. i would definalty let them build me a motor.

I second this. They are a good shop IMO