[Excaliber]

Hmmmm,,,,, I don't know about higher floats, half way up the glass should be totally fine. It DOES sound like a carb problem though! 427, radical cam and 1200rpm (or higher) idle here to.

Very difficult to get a "decent" idle adjustment on my carbs (dual fours) because the vacuum is SO low and the cam SO radical it really screws up the idle circuits in the carbs. I run an idle rpm that just high enough to keep the motor running without stalling. BUT, if I stop to quick it WILL stall.