06-27-2026, 05:12 PM

scotty54

Member

Join Date: Dec 2025

Location: Upper East Tennessee

Posts: 53

Oil Cap

I have a chrome push-on breather cap but the diameter interferes with the fuel pressure and oil pressure gauges that sit just above the oil fill tube.

Does anyone know the diameter of the correct cap, linked below? Hoping it might be a little smaller.

https://www.amesperf.com/parts/36516/

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1968 Pontiac Firebird Sprint
1991 Pontiac Firebird Formula LS2/6-speed
1977 Jeep Cherokee 401/TH400/Quadratrac

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