Just ordered 15/16", 1" and 1 1/8" Will see what works.
Saw a link (year one I think) that showed 1.5"' for upper radiator hose and 1 3/4" for lower radiator hose. Gates shows 1.5 for all hose ends upper or lower.
When I change the clamps out this week I will measure the outlet fittings. Maybe the lower IS larger?
