If Muscle Motors is willing to stand behind the problem that the OP thinks he has I can't think of any reason not to have them go through the engine again. What's he got to loose, he's not doing anything with the engine anyway. It's not like he gave them a special engine that went to a rare car that can't be replaced. It was a pieced together POS or was that pso.
it's ok to butt heads, just don't do it with a butthead
