>Anybody know the diameter of the Quadra-Jet seconday >throttle plates? From pic's they seem to be huge. > >EFI content: Maybe a good source of cheap butterfly's >for enlarging TBI systems. > >Thanks, > >BobR. Secondaries = 2-1/4" diam. Primaries = either 1-3/8" or 1-1/2" diam. Latter I think only on RB 440's. Greg > >