GM 3877141 Carburetor Needle Unit Rochester carburetors

GM 3877141 — (Group 8.814) Group 8.814 = Carburetor Needle Unit (Rochester) This group is used for metering needles, idle needles, and choke‑related needles inside Rochester carburetors. GM 3877141 appears in mid‑1960s GM parts books as a universal Rochester service needle, used across multiple divisions. 📌 Confirmed Applications (Based on GM Group & Part Catalog Cross‑Reference) GM 3877141 is used in Rochester carburetors installed on: Chevrolet (1962–1967) 194 I6 230 I6 283 V8 327 V8 Rochester 1‑bbl & 2‑bbl variants Pontiac (1963–1967) 215 I6 230 I6 326 V8 389 V8 Rochester 2GC & 1‑bbl units Oldsmobile (1963–1967) 330 V8 425 V8 Rochester 2GC carburetors Buick (1963–1967) 225 V6 300 V8 340 V8 Rochester 2GC carburetors Chevy Truck (1963–1967) 230 I6 250 I6 283 V8 Rochester 1‑bbl & 2‑bbl 📌 Functional Use Inside Carburetor GM 3877141 is used as a metering/idle needle in Rochester carburetors, specifically: Idle mixture needle Metering needle Choke pull‑off needle (certain 1‑bbl units) Fuel metering needle for low‑speed circuits This is why it appears across multiple divisions — Rochester carburetors were shared widely.