i have CFI on my car too-several tweaks can be done to
raise the H.P.well above stock rating

biggest problem
with the stock CFI is the intake manifold runners-they
are fairly small cross section and the runner inlets have
a sharp,rough as cast profile.I extensively reworked and
ported my manifold,added a 1/4"lidspacer,ported the
stock heads,and tweaked the fuel pressure up a bit-
performance increase was dramatic

everything else is stock,though headers and 3"super
single were on the car before the tweaks.