I'm running a 455 with Rhodes lifters and the 041 cam topped with a FITECH. It idles at 800 rpm with 15-16 inches of vacuum. It idles smoother than my 6.1 Hemi in my 2007 charger. My wife drives it but does complain about the clutch but has no problem with it.
I do run the timing control which did help smooth out the idle.
I get 22 mpg on the highway with the AC running as well. Around town is pretty consistent at 10. IF I really pay attention to how I drive it I can get 12-14.
I've got no complaints with the 041 and fuel injection.
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