or i will give you the low down and ne input would be good i got a 72 240z the head gaskit was blone so i changed it and i put 71 su carbs know it runs good but smokes more or less depending on how i set the carbs i can set the carbs to not smoke but the engine will hesitate on exceleration bad oh yea 1,2,and3 spark plugs look good but 4,5,and6 have a light gray coat on them

Assuming that the throttle shaft bushings are not worn out (a big assumption after all these years), here is a quick primer on how to adjust them.

http://classiczcars.com/forums/showthread.php?t=9477

thank you i have not used it yet but i dont see how i can mess it up with infermtion like that

thank you i have not used it yet but i don't see how i can mess it up with information like that

See your other post called "Problem" for more carb info.

Ok I did the test that arne sent me and the car runs great know but a minor hesitation

But I ordered a uni-sun and wen it gits here thay should be perfect