I'm currently at a stage where I am going to need to have the engine in my PA-22-108 opened up and repaired (as/if necessary).

A topic of discussion that came up around the hangar has been the idea of switching out the 4 cylinders that are currently on the engine to the higher compression, less costly (parts wise) and more readily available L2C cylinders.

I've been trying to do a bit of research on this and have found information about converting the C2C to L2C, but nothing on the C1B. I'm suspecting that it would involve the same process of enlarging the holes in the case for the through bolts (to accommodate the larger 7/16" bolts).

Has anyone had experience with this in the past?

For context, the aircraft is in the Canadian O-M category.