RE: Experts, please weigh in
bob i was going to do the same thing.
175lbs before a contest.
here are my thoughts which 98% will agree with.
Sundowner you should stay with a 46 size case engine ie: 40-55 AX size engines. the 75 will be to heavy, carry to much fuel and not be any faster than the proper sized engine.
Your 75 would do much better in a GP revolver type plane or world models mustangs.