Tyler, you can run a pressure check on the governor output and see what it looks like. The governor pressure test port is the one (1/8" pipe size) located near the speedometer adapter housing on the tailshaft extension housing. Hook a gauge up to it and start the car and put it in gear with your foot on the brakes (drive wheels in the air and on safety stands). It should be zero (or real close) when the wheels aren't moving. If it's more than 1-1/2~2 psi it's a governor problem. If it's less it's a valve body problem.
