Holley 7053-1 600 vacuum secondary main body. OE service replacement carb for 1973 and 1974 Ford 429 and 460 motors. 1979 date code. Uses 1-9/16 bore throttle body (base plate). This is a Ford reverse idle main body. It would be better for restoration and/or use on stock Ford motors or ones with short duration cams than performance motors. This carb would likely be too lean for long duration cams because of the way the reverse idle system meters air and not fuel. See below for gaged specs. This main body made during the Carter administration has been renewed for service.

SPECS:

• Primary Venturi: 1.25 (1-1/4)
• Secondary Venturi: 1.31 (1-5/16)
• Throttle Bore: 1.69 (1-11/16)
• Booster Style: Straight
• Primary Idle Air Corrector: 047
• Primary High-Speed Air Corrector: 026
• Secondary Idle Air Corrector: 047
• Secondary High-Speed Air Corrector: 028

Contact me and/or see the Holley Old Model vs Quick Fuel Q-Series Sizing guide for more info about carb sizing, suitability, etc. Glad to help get what is best for your setup!