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36tbird · 07-03-2010, 08:37 AM

You'll like the Chevy, I'm betting. I have one of GMC Bubba's in my 8BA, mechanical advance with a Pertronix. Timed it to maximum vacuum at idle then retarded it just enough for one inch of vacuum drop. It is running great. However, I am building another Chevy distributor with a Pertronix and an adjustable vacuum on it. I figure that there are more adjustment springs available for the Chevy and with the adjustable vacuum, I can play with it to see how if that works.

07-03-2010, 08:37 AM	#10
36tbird Senior Member Join Date: May 2010 Location: nw SanAntonio, TX Posts: 940	Re: running dual carbs You'll like the Chevy, I'm betting. I have one of GMC Bubba's in my 8BA, mechanical advance with a Pertronix. Timed it to maximum vacuum at idle then retarded it just enough for one inch of vacuum drop. It is running great. However, I am building another Chevy distributor with a Pertronix and an adjustable vacuum on it. I figure that there are more adjustment springs available for the Chevy and with the adjustable vacuum, I can play with it to see how if that works.