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I am trying to ID my Holley Carb in order to help diagnose a problem the car has. I've watched videos but still am not figuring out the Carb. I have attached photos that I hope will help. There are 2 numbers stamped into the carb that look promising but only one could I find on the carb listing. I dont think the description could possibly be for this Carb so I am stumped. Any help is appreciated. The photo that shows # 7794 is from the right side of the carb if sitting inside the car. The one that shows #7051 is on the left side (front) if you are inside the car.
full engine carb close up stamp shows 7051 - 6499 7794 - 6499
The part # should be on the front of the choke air horn.
That said....that carb is a Spread Bore Double Pumper. Either 650 or 750 cfm.....
The spread bore is still produced but not in a double pumper style.
They were and still are sold as a Quadrajet replacement unit.
From: At my Bar drinking and wrenching in Lafayette Colorado
As noted above, the List Number is stamped into the forward side of the choke airhorn wall - it identifies the carb. Your carb is a mechanical secondary Holley model 4165. This carb was available as a 650 cfm or an 800. The 4175 model is also a spreadbore, but is a vacuum secondary carb. The 4175 models are 650 cfm.
Lars
ID'ing Holley Carb
