Re: Camaro question ?
3/8" fuel line was used on all 2 barrel V8's (L14, LF7, and L65), Z28's and L78/89's. 5/16" fuel line used on L6's, two fuel lines, 3/8" supply, 5/16" vapor return used on LM1's, L48's, L34's and L35's. The vapor return line was an emmissions requirement on the 4bbl Rochester Carbs, that the Holleys on the 302 or L78 did not require.
Part numbers for the 5/16" L6 fuel pipe assembly is: 3958476
Part number for the 3/8" V8 fuel pipe assembly is: 3958477
(Ref: UPC8 B2)
The 5/16" fuel return pipe assembly number is: 3958479
(Ref: RPO L35 B1)
A 307 or 327 in a 69 Camaro would have a single 3/8" fuel line.
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