Okay, so my truck is running better but not great. To remind you, its a '58 chevy, rebuilt 235 ci, fenton headers, offy dual intake w/rochesters and a mallory dual point dist. It's been running rich but no real read on whether at idle of not, hasn't been driven much. After reading the tech tips I changed the jets to 51's and ran heat lines to the intake manifold with little differences. A local mechanic played with it and put 56's back in. I haven't done the other carb tips but plan on it. On removing the plugs and drilling the passage, do I need to replace the plugs? Any other advise? thanks.
