I've had it with this old original Holley. Have been trying to stop a fuel leak and stripped the rear fuel inlet fitting. I think I want to put this date coded carb in a box to stay with the car for the next owner, and buy a Holley Street Avenger to replace it. Original carb is 780 cfm. Street Avengers come in 670 and 770 cfm. I'm thinking about going down to a 670 as I don't race this car and don't go above 5,000 rpm hardly ever. In fact more like 4,500.
Talked to a Holley tech guy and he agreed and said I'd probably get better gas mileage to boot (not that I care).
I would go to an electric choke and block off the exhaust crossover to remove the heat under the carb (I've already removed the butterfly from the heat riser.
Vette(s): 1969 350 4 spd drop top
1972 350 auto coupe
I setup a street avenger 670 carb on my 72 when I built the motor 10 years ago. They come a little lean and sloppy built but with some jetting and adjustment it runs good. Not as good as an original tuned Q-Jet but not bad. My car ins not an LT1, just a warmed up base 350.
Vette(s): 1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.
I also have a warmed up 350 in a 72' A holley never worked well for me. Doesn't mean they are not a good unit. I have a professionally rebushed and rebuilt Q-jet. Works VERY well in my opinion. Give one a try. It'll mean a intake change, but may be a good alternative.
Just an update, I finally bought a Street Avenger 670 w/electric choke from Holley. Just put it on and my car runs like a top! No more hesitation accelerating from a stop and my garage doesn't smell as bad with it running.
Old date coded carb is now in the box to go to the eventual new caretaker of this car.
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