WOW, I'm gone for 2 days, and look at what got terribly out of hand.
Mazdaspeed6, i don't know why or how you got into the position you are in. Let me see if i have your story straight.
You bought a built motor from MAM a while back, it got to you and needed to be re-surfaced because the block had a deep groove in the top of it. Which you had to get remachined.
If that was the case, why didn't we see a problem thread about it then. Why did you not inform MAM of it and send it back for him to fix, which i know he would have done no questions asked. IF you had sent it back.
So you got it machined, installed the motor, and then had it blow due to the head gasket failing and letting water into the engine, thus creating all the rust in your engine?
You sent it back, and MAM told you that your warranty was no longer valid because you had the block remachined, and he can't guaruntee work done by another machine shop right? You then tell him that you never actually had the machine work done, the block had rust in it when you installed it, and you figured it would work itself out when you started it.
Then from what it sounds like, he was going to do a lot of the labor for free, and just ask that you pay for the parts, which you still owed him for the rebuild. Then you post in this thread asking where your motor is, and why its taking so long, when you haven't even finished paying him for the work.
I understand how it is to not have a car to drive because you're waiting on parts. Especially a motor. But when part of it is your fault, and you want to accept no responsibility, thats messed up.