NOTE: If your float is black nitrophyl (plastic), we always recommend replacing these with the brass float FL51
1978 Chevy Light Truck
Measure 1/16" to 1/8" in from the tip of the float.
Refer to the specifications for the float level. It can differ depending on model and engine.
Brass and black nitrophyl type floats are measured the same.
Do not put any pressure on the viton tipped needle. It will be damaged and cause flooding.
Do not bend adjustment by holding onto the nitrophyl. It could break the seal.
Float should be centered in the bowl. There is not much clearance and rubbing on the bowl side can cause flooding.
Rochester Monojet Float Level Specifications VEHICLE YEAR APPLICATION FLOAT LEVEL BUICK 1968 250 SPECIAL 5/16 BUICK 1969 250 SPECIAL AT 1/4 BUICK 1969 250 SPECIAL ST 9/32 BUICK 1970-71 250 1/4 CHECKER 1968 230 6 CYL 9/32 CHECKER 1969 230, 250 1/4 CHECKER 1977 250 3/8 CHECKER 1978 250 EXC CALIF 5/16 CHECKER 1978 250 CALIF 3/8 CHECKER 1979 250 3/8 CHEVROLET 1968 230, 250 CAMARO 9/32 CHEVROLET 1968 CHEVELLE 230, 250 9/32 CHEVROLET 1968 230, 250 9/32 CHEVROLET 1968 CHEVY II 4 CYL 153 11/32 CHEVROLET 1968 CHEVY II 6 CYL 230, 250 9/32 CHEVROLET 1969 CHEVY II 4 CYL 153, 6 CYL 230, 250 1/4 CHEVROLET 1969 230, 250 1/4 CHEVROLET 1969 CHEVELLE 230, 250 1/4 CHEVROLET 1969 230, 250 CAMARO 1/4 CHEVROLET 1970-71 230, 250 CAMARO 1/4 CHEVROLET 1970-71 250 1/4 CHEVROLET 1970-72 NOVA 4 CYL, 6 CYL 1/4 CHEVROLET 1970-72 CHEVELLE 250 1/4 CHEVROLET 1972 VEGA 140 EXC CALIF. 1/16 CHEVROLET 1972 VEGA CALIF AT 1/16 CHEVROLET 1972 VEGA CALIF ST 1/8 CHEVROLET 1972 250 CAMARO 1/4 CHEVROLET 1972 250 1/4 CHEVROLET 1976-78 4 CYL 5/32 CHEVROLET 1977 6 CYL 250 3/8 CHEVROLET 1978 6 CYL 250 EXC CALIF & CANADA, A/T 5/16 CHEVROLET 1978-79 6 CYL 350 EXC CALIF & CANADA, S/T 3/8 CHEVROLET 1978-79 6 CYL 250 CALIF 3/8 CHEVROLET 1978 6 CYL 250 CANADA 5/16 CHEVROLET TRUCK 1968 6 CYL 230, 250, 292 1/2 & 3/4 TON 9/32 CHEVROLET TRUCK 1969-72 6 CYL 1/4 CHEVROLET TRUCK 1977 6 CYL 250 EXCEPT 17057006, 17057077 3/8 CHEVROLET TRUCK 1977 6 CYL 250 17057006, 17057077 5/16 CHEVROLET TRUCK 1977 6 CYL 292 5/16 CHEVROLET TRUCK 1978 292 5/16 CHEVROLET TRUCK 1979 292 3/8 CHEVROLET TRUCK 1980-89 292 11/32 GMC 1968 6 CYL 9/32 GMC 1969-70 6 CYL 1/4 GMC 1977 250 EXC 17057006, 17057007 3/8 GMC 1977 250 17057006, 17057007 5/16 GMC 1977 292 5/16 GMC 1978 250 5/16 GMC 1978 292 5/16 GMC 1979 292 3/8 GMC 1980-89 292 11/32 OLDSMOBILE 1968 F85 6 CYL 250 9/32 OLDSMOBILE 1969-71 6 CYL 250 1/4 PONTIAC 1968 ACADIAN 230, 250 9/32 PONTIAC 1969-70 ACADIAN 230, 250 1/4 PONTIAC 1968 FIREBIRD 250 ST 5/16 PONTIAC 1968 CANADA 250 9/32 PONTIAC 1968 TEMPEST 250 5/16 PONTIAC 1969 TEMPEST 250 9/32 PONTIAC 1969-70 CANADA 250 1/4 PONTIAC 1969 FIREBIRD 250 AT 9/32 PONTIAC 1970-71 TEMPEST 250 1/4 PONTIAC 1970-72 FIREBIRD 250 1/4 PONTIAC 1972 VENTURA 250 1/4 PONTIAC 1977 ACADIAN 4 CYL 5/32 PONTIAC 1978 ACADIAN 4 CYL CANADA 5/32 PONTIAC 1978 ACADIAN 6 CYL 250 CANADA 17058014, 17058026 5/16