I'm planing to get some type of trainer/high wing plane to convert to taildrager and mount skis on to use through the winter.
I've never had a four-stroke engine, and I'm dying to get one for my "snow-bird" project.

Normally you see the normal 40 size trainer having a .40 or .46 two-stroke engine, right.
What size 4-stroke would be wise to get?
Would a OS 70 surpass ll be way to big for a normal .40 trainer? (Prop-ground-clearance, too heavy etc...)
I want to get a fourstroke that's beginner-friendly, will fit on this winter-plane, and later have power to spare for some more acrobatic plane.