Pimary jet size, Rochester Carburetor, 1978 L-48

[Dan L.]

I am looking for information on the size of the factory installed primary metering jets for a Rochester carburetor on a 1978 L-48 engine, Automatic no AC. Number stamped on the carb is 17058202.

Thanks.

Dan Leslie

[William C.]

Re: Pimary jet size, Rochester Carburetor, 1978 L-48

Part number 7031977, I believe the last two numbers are the jet hole size (.077) but may not be true for the newer years. Chassis service manual may have the size. The applications I show for that carb are for a 350 engine, Federal spec, auto trans w/o A/C

[Clem Z.]

Re: Pimary jet size, Rochester Carburetor, 1978 L-48

Part number 7031977, I believe the last two numbers are the jet hole size (.077) but may not be true for the newer years. Chassis service manual may have the size. The applications I show for that carb are for a 350 engine, Federal spec, auto trans w/o A/C

#77 is the correct jet and the metering rod is a 53K, 0.053 X 0.047 diameter