Using Big boyz compression calculator, ASSUMING 85cc head chambers and the stock piston with 1.5cc for the valve reliefs and a stock Harley headgasket (0.045) and adding in Cleveland's 800 foot elevation and assuming your deck height is 0.034 on both cylinders.
You should have a static compression of 9.28:1 and adding in the SE-255 can strait up you should be right at 9.0:1.
IF you used the Cometic headgasket (0.030) with the same above you will have a static of 9.53:1 and a adjusted running with the SE-255 of 9.24:1.
The only way to really know is to blueprint the top end, this will require the heads to be removed to measure everything on both cylinders.
OK thanks, my understanding was, the forged were larger than the cast. is that correct ? also than, would the forged be closer to 2.0 and the cast be closer to 1.5 ??? i want to make sure i got my facts straight .