Cubs are made for poddering around mid throttle and I dont really think the ball bearing 32 and 36's are "right" for a cub.  If budget wont go to a 4 stroke, why not look at a plain bearing 40 like an OS 40 la or a TT 42gp. Easy to set up air bleed carbs, tamer state of tune and similar light weight to a bb 36. Probably a lot happier swinging a 10 x 5 or 10 x 6 prop at mid throttle speeds too.