Re: Holley Street Avenger 770 - dumb question
I was running a 780 on my 383 and switched to a 670 avenger and there is very little difference. The 670 throttle seems just a tad more responsive. Both are vac sec carbs as is the 770 and with the right sec diaphram spring the sec's won't open any more than needed. I tend to agree with running a smaller carb but the 770 won't be out of place on the 383...
My guess is the guy put the same jetting in the 770 as comes factory in a 670.
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