Wow, you're pushing my knowledge--our mech expert (Poconos) and the pool dealers should be able to help you.

You can also call Hayward. I didn't get a "set", so I called Hayward and found that their t210 (top mount valve) and their SuperPump 1hp 2speed were, they said, a fine combo, even though they aren't paired and you don't get a base. Hasn't been a problem--24" pavers make a fine base--I don't even bolt the pump down. I run it on low most of the time and never have a problem.

So call Hayward, call your pump manufacturer. Ask the folks who make them.