Well the transmission is back on the engine and the clutch system pressure check duplicated and all appears to be working correctly. Left it pressurized for an hour -- no leaks observed.
Finished mounting the radiator and guard on the Test stand and added a bracket to support a small lawnmower fuel tank which will be used to gravity feed the carburetors. If flow is not enough to run engine I'll add a small electric demand style pump.
All going well I'll run engine for a extended period next weekend.