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What would be most recommended for a 340 4-speed car. Will have the Comp 268 cam (unless other is suggested) and 3.55 rear - why double-pumper over vacuum (if recommended) ? Thanks. I have a 670 Avenger (vacuum) that I can use - but not sure if that's what I want on a 4-speed car. I'd like to...

How is step 3 performed below (tweaking kickdown) - where's the screw (vac secondary Avenger) The tuning DVD I got from Holley was blank ! 1. pull kickdown off of the carb. 2. set the gas pedal to WOT. 3. looking down the carb, adjust the accelerator linkage until the throttle plates are...

Will this work : 73 Dart has a tank with vapor return line, I'm running a new 3/8 line to pump can I cap off the nipple for the vapor line or should I run it "elsewhere" for ventilation ?