I swapped the hd330 for a 391 into my 1977 f600 dump truck and started it today. The distributor that came in the 391 just has a vacuum advance, no governor. The distributor an carb off the 330 has a governor. I had to use the carb on the 391 and when I started it, it would idle good but would not accelerate. Is there something I can bypass on the carb? I don't want to put the governor distributor off the 330 in it if I don't have to. Is there any way to make this carb work with a regular distributor?

 

Yes dont plug the gov. lines on the carb. If you do the diaphram will
close the throttle plates.....

 

I'm dealing with the same thing. So, new carb and leave the hose from the distributor disconnected ?

 

Same type of situation, but my carb is toast. So if I buy a new carb, and just leave the governor hose from the distributor unhooked, everything will work fine?

 

Is there a reason you don't want the governed distributor.
We ran several 391's back in the day and the only one we had problems out of had a stuck governor weight in the dist that would allow the engine to over rev. That engine broke 2 pistons, pulled the little end out of one rod and broke a crank, all at different times so in a two year period I had that engine down 4 times.
After finding the dist problem and fixing it the engine ran for several years.
3900 rpm was the governed speed for a 391 with the heavy truck pistons they used.