Holley 4010/4011 good,bad,ugly?
Years ago I ran one on a 289. Good gas mileage and impressive when the secondaries open up. It's recommended that you don't use an adaptor to mate to your intake, but I did.
70 Maverick Grabber, 5.0 (Perf. RPM heads, RPM intake, 625 Street Demon, Comp XE266HR roller cam, EDIS/Megajolt ignition, long headers), T5Z w/Steeda TriAx shifter, 9" Trac Loc w/3.89:1, 31 spline axles.