Look for a scope that does not have a fast focuse eye piece, the eye piece is usually smaller in diameter. A couple that come to mind are the Weaver Classic V 2x7 or 3x9, Leupold V-I 2x7 or 3x9 and the epRedfield line.
If it has an early. Weaver side mount you will have to grind the area between the rings to clear the full saddles windage adjustments on the newer scopes