Overdrive Pulley Set?

A 68 A/C water pump pulley is smaller than what your running. This is an 8 arm impeller? With an anti cavitation plate?

Thanks! I'll have to look into this. And for a water pump, I'm running a milodon high flow unit (8-blade w/ anti-cavitation plate).

I think march might make an overdrive crank pulley. I saw it when I bought the under drive one.

Thanks for the lead. I just called them and they do sell a 1:1 set as their "high flow" set, which consists of a 6.5" crank pulley and a 6.5" w/p pulley. Unfortunately, this isn't much different than what I've currently got.