Thanks guys , my carb is a 3310 with vacuum secondaries on an old Edelbrock DB4B intake with a 1" spacer , vacuum advance installed Petronix distributor . I havn't got to the point of
That's a really old holley 750 carb. Normally the primary's are larger than the secondary's. You stated your primary's are .076's and secondary's are .078's that seems very small for a 750 carb. If I were you I would look into another newer carb. At the time I was looking I couldn't afford a brand new Edelbrock so I purchased a 750 Remanufactured one from National Carburetor out of Jacksonville Florida for half the price ( $239.00 ) and couldn't be happier. It runs great and with a life time warranty I couldn't go wrong.
