[elmariachi]

i can thank a Street Demon 850 and a Mighty Demon 750 for everything I know about carbs on Cobras. Jacking around with those two for 18 months was great training for the 5 minutes it took me to set up my pair of BC/BD Holleys. I personally think Barry Grant made a decision many moons ago that more timing (and subsequently more vacuum) versus less makes it easier to mask carb tuning quirks and maximize performance and that became the company line. I like the BG 4 corner idle, and the idle-eze was a great alternative to drilling the butterflies. But my car NEVER ran as good with either of those as it does now with the twins, both of which are going on 50 years old. And where BG had me trying to set it at 22-24 initial timing, I am back at 18 initial with the twins and it runs like it should.

I agree with Lovehamr, get the manual, baseline it on the bench and start from scratch.