I have a E-Brock Performer #2176 manifold and #1406 Carb on my '87 318 and I wish I had bought the smaller (500 CFM) #1403 because I had to buy the #1487 tuning kit to get the tune close. I had a #1407 on my '64 Polara with a 440 cruiser and it was not a happy combination, terrible throttle response with 727 and tight converter. JMHO.
