90 style 90's ?? Never heard of that before,, LOL ,

so people are putting a 90 size in a 60 size plane I take it,, which is what we think,, The 60 size in a 40 sized plane should be okay, but some people are saying no, I guess I'm just trying to find someone who has actually used a 60 in the GP 40 sized Mustang before I comit 3 other people to the purchase of everything.

By your message it looks like the 60 would be under powered for the 60 size plane and that was exactly what I was looking for. Thank you.