I had a problem with the stroker I bought from KC. A head gasket failed after about 500 miles worth of driving. When I took it apart I found they had used those graphite Ford head gaskets, and when checked we found the gasket was thicker by .012" at the upper head bolts than the lower bolts. The machine shop said this indicated improper torque.
I also found rusty sediment in the engine, it looked like the boil process was skipped. I was unable to remove the drain plugs from the block, two tools were broken in the process. I ended up making a vacuum like tool with small diameter tubing that I could slide into the holes for the water jacket and suck the sediment out of the block. I kept the sediment as a souvenir and even thought of sending a sample to KC.
While I did all the work other than a pressure test of the heads, the repair cost me $280.00 in parts. All I wanted from them was to cover the costs I incurred. They denied any responsibility and offered to send me replacement head gaskets, this saved me about $100 of the total, had they agreed to the total I would not have even replied to this. I spent over 7K for the motor and a dyno run with them, in my opinion they should have stood up and taken responsibility, just thought you would want to know.
