240 Trick Flow 440
With 4.56's, I would not worry. I don't think your idling around town for long periods from zero to 45 mph.
True. I can get into 3rd gear around town with the GV turned off.
But this is what I'm talking about.
5400.......................546/561...................546/561........0
5600.......................541/576...................532/568.......-9
5700.......................539/585...................530/575.......-9
5800.......................534/590...................517/571.......-17
5900.......................525/591...................508/570.......-17
6000.......................512/584...................497/568.......-15
6100.......................503/585...................480/558.......-23
6200....
I trap at 6200RPM now and make peak power at 5700ish. I know the new cam and heads will up that but I don't know if it will up it enough to make it worth losing power under 5600?