need help

you need to do the fuel line mod... its very simple to do and has great rewards... also as said get a thick spacer for the carb to intake manifold...

this isn't your 1 barrel but somethin like this... see how the fuel line goes behind the alt and over the valve cover... the alt fan keeps the filter cool....

I agree that the hard starting sounds like hot fuel vapor lock especially when it dont do it on the cold start. The pinging at low speed is too much initial timing. A rough idle can be anything but as said motor manuals have much to offer but setting an idle is best done with a vacuum gauge. Set the idle speed that your engine requires in park or drive (the manual usally states one or the other or both). Then adjust the air fuel mixture until absolute best vacuum reading is achieved by turning the screw very slowly starting at one turn out and usually not going further than 2 & 1/2 turns to 3 turns out. But remember if you reset timing or idle set screw you have to reset air fuel mixture screw/screws to max vacuum!:rock: