Page 12 of Square-Bore Carbs by Edelbrock

index qwikdata shocks suspension exhaust access water pumps nitrous cams access heads efi manifolds install items gaskets fuel pumps carbs access crate engines superchargers kits power pkg carbs q-jet q-jet performance parts primary metering rods for edelbrock and gm rochester q-jet carbs not for computer-controlled carbs note calibration changes may affect emissions-legal status of #1901 #1902 #1903 #1904 #1905 and #1906 primary metering rods pairs .035 1936 .037 1937 .039 1939 .041 1942 single taper for q-jet model 4mv 1974 earlier dimension indicates maximum diameter of taper .043 1944 .045 1946 primary metering rods pairs single taper for q-jet model m4m 1975 later and edelbrock #1910 dimension=maximum dia of taper .048 1941 .050 1943 .052 1945 .054 1947 secondary metering rods dimension indicates tip diameter letters are for identification purposes only ck 0527 1952 cl 0667 1954 cc 0300 1950 ce 0410 1951 ay 0567 1953 secondary metering rods all years pairs primary metering jets all years pairs .068 1968 .069 1969 primary metering jets .070 1970 .071 1971 .072 1972 .073 1973 .074 1974 .075 1975 .076 1976 .077 1977 secondary metering rod hangers all years number in parenthesis indicates hanger height from rod hole to hanger mounting surface see fig a hanger b 520 1960 hanger k 565 1962 hanger v 615 1964 hanger g 545 1961 hanger p 590 1963 secondary hanger race calibration kits includes 4 pairs 1992 or 6 pairs 1991 of primary metering rods 5 pairs of main metering jets 5 pairs of secondary metering rods 5 secondary metering rod hangers high capacity .145 diameter needle and seat assembly high-performance accelerator pump and 4 power piston springs race calibration kit for model 4mv 1974 and earlier and edelbrock #1901 and #1902 1991 race calibration kit for model m4m 1975 and later and edelbrock #1903 #1904 #1905 #1906 and #1910 1992 figure a hanger dimension reference direct replacement phenolic floats high-performance accelerator pump plunger #1982 for model m4m 1975 and later and edelbrock #1910 1984 for model 4mv 1974 and earlier 1985 additional accessories throttle kicker bracket #1997 throttle kicker bracket 1997 bracket to mount factory throttle kicker to #1903 carb for 1980-85 heavy-duty 3/4-ton and 1-ton trucks airhorn gasket kits includes 5 gaskets for edelbrock q-jets #1903 #1904 #1905 #1906 and #1910 1987 #1901 1989 #1902 1998 power piston spring assortment 1994 4 power piston springs allow fine tuning of metering rod staging includes the following springs golden 4 hg orange 5 hg black 6 hg and yellow 8 hg hardware kit 1986 includes 2 primary power piston retainers 5 accelerator pump lever rollpins 5 choke linkage clips and 3 secondary hanger screws needle and seat assembly 1980 high-capacity/high-flow .145 diameter needle and seat assembly high-performance accelerator pump plunger and spring 1982 shorter than standard street plungers this pump gives additional pump shot volume high-flow needle seat #1980 42 not legal for sale or use on pollution controlled motor vehicles.

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