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durasparkII distributor, jacobs milage master ing. and a 600cfm holley vac. sec. carb.

I had it hooked up to the upper vaccum port on the passanger side of the carb, same place in it is hooked up on my truck, where it works great.

The motor seems to idle fine, but as soon as you give it any throttle, with the vaccum advance hooked up, it wants to die, Once past say 2500-3000 rpm it will run great though.

If the vaccum advance is unhooked, it runs great. Timing im unsure about, buts its around 10 degrees.
Any suggestions on what would cause this?
 
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