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felm0001 · 11-07-2012, 01:03 PM

Thank you for the reply,

Yea, I disconnected and plugged the vac advance when I timed.

Yep, I rewired the whole engine harness with 12 gauge. I am currently still picking the tar crap out of the bulkhead connector. (I have a duck tape bulkhead connector in there now)

The firewall plug is tight. I did not use any dielectric grease though. The battery is new as of Jan this year and the posts look clean enough, could the issue be from the draw on the distributor if it fires fine with the vac advance disconnected?

I have the Haynes GMC truck manual and he has 4deg advanced for the 1967 250 manual on points. Not saying he is right, but that is what I have been going off of.

When I set the timing initially I turn the distributor until she ran smooth, then I set it to the closest mark on the balancer, which was i guess is 8deg of advanced.

But I am down for anything so, I will see if I can get it running smooth at TDC at idle and then see if that sets the vac up for a bit more success.

11-07-2012, 01:03 PM	#3
felm0001 Registered User Join Date: Sep 2012 Location: GA Posts: 8	Re: 250 HEI Timing, vacuum advance question Thank you for the reply, Yea, I disconnected and plugged the vac advance when I timed. Yep, I rewired the whole engine harness with 12 gauge. I am currently still picking the tar crap out of the bulkhead connector. (I have a duck tape bulkhead connector in there now) The firewall plug is tight. I did not use any dielectric grease though. The battery is new as of Jan this year and the posts look clean enough, could the issue be from the draw on the distributor if it fires fine with the vac advance disconnected? I have the Haynes GMC truck manual and he has 4deg advanced for the 1967 250 manual on points. Not saying he is right, but that is what I have been going off of. When I set the timing initially I turn the distributor until she ran smooth, then I set it to the closest mark on the balancer, which was i guess is 8deg of advanced. But I am down for anything so, I will see if I can get it running smooth at TDC at idle and then see if that sets the vac up for a bit more success.