I am making some cooling system changes but I'm pulling a brain fart. Does anyone know the inlet / outlet sizes for the waterpump. I cant find the hose I pulled and its snowing like hell out right now. I'm thinking 1 5/16 but I want to be sure.

My car is a 91 240sx swapped and I use a aftermarket radiator. The inlet / outlet are both 1.25 inch. The top hose is fine, but the bottom hose I made with a two hoses stretched over a piece of pipe. I just ordered the Jags that run steam adapter for the top hose, but I want to order a temp adapter for the bottom hose. I just don't know what size I need for that. I used some 1.5OD chrome pipe left over from a plumbing trap.

I did the math for the adapter
1-5/16 = 33.33mm
1-1/4 = 31.75mm

If the sizes are correct is it possible to stretch the skinny 31.75m over a 34mm water temp adapter?