I saw a post on here a while ago about metering blocks deteriorating. my carb started leaking so I took it apart to check it out this is what I found. If you touch anything in there at crumbles to dust.
Funny thing is I was driving this car a couple weeks ago. Guess I need some new metering blocks...

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68 cuda formula S 588" bb 5sp
70 CUDA CONVERT 500" 5SP (SUBLIME)
70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!