HEI convert c-60

[Leonard1]

Here's one thats a little out there. I have a 75 C-60 that I'm trying to convert to HEI (it's a Grain Truck). It has the stock 2 bbl, with a ?governor? on the passenger's side. It had a hose going to a tee on the back side of the distributor. Anyway, I removed the old points style distributor, the real tall ones like came in 2-ton trucks, and dropped in the HEI, ran a power wire from the ign circuit in the fusebox, and she hit like a champ. Idle is near perfect, so I put the timing light on it and tweaked it where I wanted it, and connected the vacuum advance line to the governor. Still ran fine until you touch the gas pedal, and it dies immediately. Remove the vacuum line, and all is well. Any ideas where I should get vacuum for the new HEI, or what I need to do with the line from the governor? I'm at a loss over this one.