It is a 230 or 250 6 cylinder still haven't narrowed it down to which one. My bore scope is not working so can't look at the top of the pistons. I was of the same opinion Jerry, I have had 8 cylinder engines sputter but not run when they were 180 out but don't have any experience with a 6 cylinder 180 out. The item with the timing mark does not look like a typical harmonic balancer It is a heavy duty two belt pulley with a grove cut in the edge of the pulley. Could I be mistaken on this mark as TDC I know how to find TDC on the Engine but haven't gone down that path yet.
