I was looking at the 4bbl carbs I have, matching up the intake on my 64 Fury, and came across a few AVS and a couple Thermoquads, neither of which have the same bolt pattern that my Poly intake has. The bolts on the intake are 4.5x5.5, not quite square, but nothing like the AVS or Thermoquad.I think I have an intake "modifier" to change the bolt pattern (can't find it right now, but isn't that the way it always is) but wonder what the original 4bbl was for an early Poly with the 4.5x5.5 stud pattern?Larry (Akron)