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do you mean the carb gasket ? was not exactly the right one ?
with the carb getting black/soot in it and not running right point to a big vacuum leak issue
hey jazzmaster,that is correct carb gasket wasnt exact for factory q-jet,but he said it would work,and it did as car rar fine for approx.6to7 weeks.took it on a few long trips[100+miles]no problems,again he did say distributor needed curve kit ,but my intentions were to upgrade intake manifold[weiand stealth dual plane]carb[holley street avenger 870cfm] and dist.[pertronixs flame thrower 11 with matched coil]next month already got price from summit racing with all gaskets ,brackets and fuel lines,also new holley 80 fuel pump,thanks john m.
did try cleaning carb with gumout carb cleaner.followed directions and cleaned exterior good then started up and sprayed into carb,didnt help at all .how would i check for vacuum problem besides checking condition of hoses,thanks jazz.john m.
you should spray a little at the base of the carb ,and the intake gasket -where the intake meets the block and also need to check the dwell which should be at 30 degrees the dwell is the fine tuning of the points ,if the distributor cap has the metal door in it then you can adjust that there with an allen wrench.,if the points are out a bit ,it will give the symptoms that you have as well.
and please do check the air/gas mixture screws as well ..jazzmaster ....