I think the kit is around 25.00 and maybe about 2-3 cans of carb cleaner to spray into all the orfices. I would also call a carb place and see how much they charge. maybe under 100.00. My CJ7 was only 68.00 and was worth it since they dunk it and get rid of all that sludge and dirt.
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Only 1/4 mile track I know is Gandy Bridge