The Mach I is a larger and heavier plane than the Mach II.
I run a OS 46 LA on my Mach I and it does fine.
It is a very aerobatic plane with a semi-symetrical wing.
I also had to add a weighted spinner to get it to balance.
I would be skeptical of the 36 with this plane.
Fly? Probably Perform? I doubt it.
Try it and see. If you don't like it - buy a new engine.
There are a lot of 46s out there for less thay $100.
Good Luck,
KW_Counter