Tell him what you are thinking, if the parts are ordered and he put out to get them then it would be wrong to stiff, but if he can stop the order, or if you paid for them then no problem. Just let him know. I seriously doubt that he will get his tools, have them setup, and get your engine done in a week..oh yeah the court order as well? Never gonna happen...maybe a month, not a week. So in a sense is he really being honest with you? Optimism is ok, but reality is better. Good luck either way.