> > suggested that I remove the front of the carb and clean the primary
> > jets etc. I did this, and removed as much of the old gasket as I could
> > and replaed with new. Now when I try to start the car, it won't,
> > backfiring badly. What have I done wrong, or where should I be looking?

I rebuilt a Holley 4160 years ago and the new gaskets were "almost"
identical with the exception of one little hole that was missing in the
gasket between the body and the primary metering block. It caused symptoms
similar to yours. Is this possibly your problem?