Join Date: Sep 1999
Location: Vancouver, WA, near Portland, OR
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Re: Carb trouble on \'77 J20 w/401 auto
Believe it or not the stock carb was a Motorcraft, (Ford). If you say it has a manual choke then it's been converted. Could be a Holley or Carter or ? Chances are it's in need of a tune-up and carb rebuild or replace. If you replace, I'd get a Carter AFB over a Holley. Edelbrock makes their Performer which is a clone of the Carter, but not as good of quality.