![]() ![]() If there are changes, it would be best to return the carburetor back to stock at least to establish a point where we can begin to make some.I went with the 6224s, swapped the metering blocks from the 1850s (which have the power valves) in place of the ones which came with the 6224s (which have the power valve holes blocked) and played with the jets until I was satisfied. The metering plate PN 134-21 is equivalent to a 75 jet. ![]() ![]() simply taking drawn up idle fuel through the idle feed restriction and then straight into the hole that's the equivalent to #6 in the upper pic of the image above, under/past the secondary idle air bleed, and straight down through the main body to the throttle base plate's secondary transfer slot and idle mixture …The 0-3310-4 is a 4160 Holley that uses a secondary metering plate with a fixed jet. ![]()
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