Lucky: --- You may want to think twice about putting a 40 on that plane. Remember it called for a 25 on the high side and that was back in the 70's. Say what you may but the 25's today ARE better engines and may be plenty of power especially for an older plane. Another thought might be a 32 but even that might be more then needed.
As far as the wing is concerned, I'd suggest glassing it all the way around, not much gain if you only do one side.
I do remember the MEN and have flown one or two but so long ago that I don't recall much about them, seemed like they flew OK for what they were. ENJOY !!!! and Good Luck. RED