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I took it apart, and it looks recently rebuilt.
Most rebuild kits come with an assortment of gaskets so one kit will do a multitude of 4150/4160 Holleys.
Some one may have done a poor job of matching up the gaskets.
Take it apart and see if any of the passages are being blocked.
Slow to rev and popping back thru the carb are signs of being lean (and/or slow timing), I doubt it's the power valve.
BTW, the #1850 is for universal applications and not an OEM carb. OEM Holleys will not have externally adjustable floats.
Last edited by B5 Bee; 11/02/09 09:53 AM.
