I am confused - but that is nothing new
I have two 1966 Birds. One convertible (no A/C) one Landau w A/C.
Neither is emission controlled vehicle. Both are 390 cu.in.
A/C car has Autolite 4100 with 1.12 venturi
Non A/C convertible has Autolite 4100 with 1.08 venturi
Which carburetor is supposed to be on car? Which was changed? I know the 1.08 venturi is 480cfm and the 1.12 is 600cfm.
I know that bigger is not always better - which should I put on?