Need Some Advice On Motor Work!

[JoeT]

As some of you know I have 1980 Trans Am, no booing or hissing please.

Anyway I had the motor work done on this vehicle at a place called OPM Customs in Tempe to the tune of about 7900 bucks, to make an extremely long story short, the motor has already blown, or at least I believe it has a blown head gasket, milkshake colored oil, which I drained completely a day after it overheated. The shop WILL NOT stand behind their work, so if anyone knows this shop, I do not recommend them! I am also currently in the process of going to small claims court to recoup some of the loss, but there's no guarantee they will pay. Most shops arent know for honesty.

Anyway, money has recouped a little since getting rid of the Mustang so now I'm trying to put myself in a position to get the Trans Am running again.

The question is, does anyone know of a shop that is straight up and knows what the hell they are doing? Do they stand behind there work with a written guarantee. Aren't there any shops like the ones I see on Spike TV in Arizona, where they truly seem to care about the cars they work on?

I'm not a huge mechanic in anyway, I know simple basic stuff but in no way do I know rebuilding of motors, so I'm leaning on the Mustang Club to help me here with some direction.

The motor currently in the vehicle is not numbers matching as a 1980 TA came with a 301 or 305 motor, I pulled the motor and replaced with a Pontiac 400. Has Ram Air III heads off a 1967 GTO. Has a minor cam and an Edelbrock Performer intake with an Edelbrock 650 CFM carb, hedman headers, only ones that would fit. Other than that I'm clueless. Ran pretty good initially, but I had less than 500 miles on the motor when this blew, and of course the shop says its because I race around in the car. Which is not true, I do not abuse my cars, and especially one that I have about 30k into.

So if anyone knows of a shop that is capable and competent to handle this please let me know.

If you read this and own a shop I will require a written guarantee. Im extremely picky, and will go over the car with a fine tooth comb upon dropping off the vehicle to insure no damage is done to the car while in the shop, I will hold the shop responsible for any damage occured while in your possession.
The car is virtually restored completely except for this motor issue.

Eventually the goal is to enjoy the car this fall because of the T-Tops and then dump it next year for another Mustang.

I'm hoping someone has a few ideas, because Im really gun shy now of shops. This restoration of the TA has been an 8 year nightmare. Nobody does what they say they will in the beginning to get the work. They are my best friends initially, then they change on me when they know Im trying to get the best from them. When I try to get them to promise me something they usually start with "Keep In Mind This is a 30 year old car". Which is BS! You spend enough it takes away from the age of a car. Spending 7900 on the motor this car should scream and like it!
I'm a car guy, so I want maximum effort for the money I put out.
I also don't want the car to sit in a dirty dusty shop for months. If you cant handle the work please don't apply.

Any advice or direction I would greatly appreciate it.
Car does not run currently.