If you already have an existing
SC500 for a Holley Carb there are three modifications
that you will need to attend to. If you are ordering
a scoop new then specify a demon Carburetor when
1 The notches in the SC500 base plate for the
fuel lines will have to go lower and slightly wider
than for Holley Carburetors. The Demons are slightly
different here, see pictures below.
You will have to massage the underside of the
plastic adapter. This is necessary because the
float bowl on the Demons are level with the neck
and the Holleys step down about 3/16", be
careful you dont grind through the plastic adapter
when doing this (if you did you could re-seal
it with some silicon). Use a rotary file on a
grinder, see pictures below.
The rear bowl vent tube needs to be cut down
from 1 1/2" to 1 1/4" overall height.
The front vent is ok, of course all SC500 applications
need the choke removed.