Holley Carb ???

[FASTRAT]

can u interchng the front metering block on Holley carbs from 1 to another?...also...do most metering blocks adjust the same? (air screws)...i have a Holley 2bbl that has no block which i would like to make work for my application
fastrat

[058]

can u interchng the front metering block on Holley carbs from 1 to another?...also...do most metering blocks adjust the same? (air screws)...i have a Holley 2bbl that has no block which i would like to make work for my application
fastrat
Yes, but you need to see to it the PVCR and the IFR is the same for the carb its going on. The idle screws adjust the same from one Holley to another. No more than 1.5 turns out, anymore than that something else is wrong or mis-matched.

[502 JET]

Metering blocks are different you should check the numbers of your carb to see what it should have on it.Small carbs have smaller metering block passages.For more info look here http://www.holley.com/data/TechService/Technical/Carb%20Numerical%20Listing.pdf