predator 212

#1
i have a predator 212 with 26 pnd springs and billet rod and 268 hot box cam, and a mukuni 22mm carb
stock push rods and stock rockers lash is .003 for rockers
stock timing key and fly wheel
now the problem is it just bogs if i hit the gas it idles fine but will die if i hit the gas to fast
i have tried 4 different hi end carbs and no matter the jets i use or change if is the same
i tried a 8 degree timing key and now it seem it doesnt want to start at all?
what am i missing any help would be awesome thank you
 
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