A small amount of history:
I have a 440 with a date stamp of 76. When I bought the car the only thing I knew for sure about it was, it had a set of 915 heads (in unknown condition) and it was suppose to have been rebuilt (unknown date).
This week I pulled the motor out and started tearing it down. I have found that is has .030 pistons and an unknown aftermarket cam. The pistons are flat top with no valve reliefs in them. The pistons sit a ways down in the cylinder, but I'm not sure exactly how much. The 915 heads have had hardened valve seats put in them, and the valves are aftermarket but very weak.
Is there a way that I can measure the bore, stroke, depth the pistons are in the cylinders, combine that with the factory rating of 78cc the closed chamber heads are suppose to be to find out what compression ratio my motor has?
Any help would be greatly appreciated.
Slim.
