"Mickey" wrote in message
news:Gkjlc.9337$A27.2420@fed1read06...

I rebuilt the carbs, new thermostats, new water pump, new Holley "blue"
fuel
pump with a regulator set at 5 psi to replace the VRO and a 50:1 fuel mix
in
the tank.

Do you have the VRO wiring completely removed from the pump?
If not, the built-in low oil safety feature may be sensing low oil flow and
restricting the motor's rpm's