Can anyone tell me what size bolts are needed for the motor mounts and were I can buy them. Thread size, length, etc. please it will be much appreciated.
why cant ya use the stock ones?

Im a Xbox 360 fanboy...and damn proud of it!!
I've had my upper motor mount bolt snap, and it was when the bolt was not all the way screwed down. And it was during auto-x. If the bolt is screwed in, i would get a stock bolt, or a similar thread and length(from advance auto). That's where I got my replacement. If you think that is not good enough, then cryotreat even those bolts. If those still break then, I don't know.