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Lobe ramp rates: Less XR, XER, XFI, EPS, LSL, LSK More
Go with the comp cams XER 232/234 112lsa, basically the TV2. Power band should peak around 6200 on those crap heads, shift at 6500. It would respond well to better heads later on.
PAC beehives are only good to .600 lift, the new comp cams beehives can go higher. I would run patriot gold doubles or prc doubles on XER+ lobes for better valvatrain stability.
You need to measure pushrod length for proper preload...Aside from all the tolerance differences in stock parts, the cam lobes may have a different base circle. Throwing the 7.4" rods in is a gamble.
If you dont have the funds to do the cam, pushrods, springs, gaskets, fluids, oil pump, tune, and install/tune all at once, WAIT.
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1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
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