Let me try to cover the specks. It is a C-85, which the cranks are hard to find, so they have come up with this conversion, where you put a O-200 crank and rods in the C-85. The O-200 has a longer stroke. The compression on a C-85 is 6.3 to 1, so I was thinking with the O-200 crank and rods longer stroke there should be an increase in compression, but nobody has ever ran the numbers. I was wondering, so the power increases cold be figured out.
The C-85 is a 188 ci, while the O-200 is 200 ci.
C-85 stands for 85 HP. O-200 is 100 HP