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scicala · 11-15-2019, 11:15 AM

If it's the original type carb on your '55, then it's a Holley/Ford 2100 carb. It should be marked 1 1/16 on the back side about halfway up. That's the venturi size (1 1/16").
Guessing it flows between 200 and 225 CFM. The carb size isn't the determining factor in selecting the correct PCV. It's the cubic inch displacement. Get a PCV from a similarly sized newer engine (later than 1963).

Sal

11-15-2019, 11:15 AM	#3
scicala Senior Member Join Date: Jun 2010 Location: Detroit suburb, MI Posts: 3,706	Re: 1955 ford with 2 barrel ford carb If it's the original type carb on your '55, then it's a Holley/Ford 2100 carb. It should be marked 1 1/16 on the back side about halfway up. That's the venturi size (1 1/16"). Guessing it flows between 200 and 225 CFM. The carb size isn't the determining factor in selecting the correct PCV. It's the cubic inch displacement. Get a PCV from a similarly sized newer engine (later than 1963). Sal