Vortech 1964-1967 Pontiac GTO Carbureted User Manual
Page 16
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7. CRANK PULLEY, SUPERCHARGER PULLEY AND BELT INSTALLATION
A.
For 1964-1967 vehicles with a 6 bolt damp-
er, place the crank pulley spacer onto the
damper oriented so that the pilot on the
damper centers the spacer. (For later vehi-
cles with a 4 bolt damper, the spacer is not
used).
B.
Place the v-belt crank pulley onto the spac-
er (or damper) and secure using the original
number of the supplied bolts.
C.
Place the supplied 10 rib supercharger
crank pulley onto the v-belt pulley. Install
using the four 3/8 x 1.25” bolts and wash-
ers supplied.
D.
If the supercharger did not come with a
pulley already installed, lightly grease the
supercharger input shaft and/or the super-
charger drive pulley bore. Install the pulley
onto the supercharger input shaft and
rotate the pulley to align the keyway. Slide
the square key into the keyway. Install the
pulley retainer assembly into the input shaft
and hand tighten.
Note: The crank pulley assembly
supplied with this kit is
designed to work on 389 and
400 cubic inch engines. For
this reason, pay close attention
to fitment during installation.
Note: If the supercharger drive pulley
will not slide onto the shaft, DO
NOT FORCE IT. Light heating
of the supercharger pulley with
a propane torch will aid
installation.
Note: Check vehicle for radiator fan
to crank pulley clearance. If
there is interference, either
space the fan forward or
replace it with a low profile
electric fan.
Fig. 7-a