I have a '57 F 600 292 with a Holley  C2TE N  A1JB carb. Does anyone have info on the original use? I also have a Ford flat top from a '59 pickup, 1.010 venturi, 1.430 throttle bore.(no tag). Can anyone suggest which one might get better MPG?,,,,other than just try 'em with jet changes? I now get 10-12 w/ OD trans & 2 speed.  THANKS,  Park