Gap or side clearance? If side clearance a 5/64" (.078") std width Mopar ring. 1/64 smaller would make an additional 15&1/2 thou side clearance on top of the several thou there now which would be way out of spec. For a low buck deal I'd try it. It wouldn't seal as good and I'm sure the up/down play would shorten the life of the rings/piston