This is my issue I have a 29 ford rat with chevy 283. While driving it cuts
out over bumps or even on cement freeway that is uneven, giving you up down motion. Things I have noticed eng. running very rich. I'm running 3 rochester 2bbl. progressive linkage with offie manifold.Have checked float level.Good. Inside of center main carb. has lots of soot/black in throat. And Carbs are fresh. Was wondering if anyone can tell if this early 57 283 should have a pcv valve. Keeping in mind offie manifold & valve covers have no breather holes, eng.block has breather fitting near dist. and oil tube at front of intake with vented cap. When veh. purchased it had a pcv valve between center carb. an block vent. Have eleminated ign. malfuncations.But I
am running early mallory dual point ign. with coil & external resistor.FYI.
Also have eliminated fuel delivery issue.Any suggestioned helpful.
Been banging my head on this one.