Tig, a rocker change might not increase power that much. A lot depends on the cam profile and duration. Do you know the . 050 duration and . 200 lobe lift duration of the cm3 cam? It is possible the tunnelram may not perform as good as a 3x intake. I am not sure, but heard Indy made changes to the 3x recently.
I So much depends on the chassis and driveline, anything not just right and it drops the estimated power output. So i don't think most calculaters are spot on. The duration @ .050 is 284in / 300ex, .480" / .450" lobe lift. 108 / 116 CL. Don't know the duration @ .200". We picked up a little going from the 3X and a 1250 to the T/R with 2 x 1150 dominators. The 3X used to run 1 and 2 lean, porting improved it but did'nt eliminate it entirely. The T/R seems to have better fuel distribution. Agree on the chassis but in defense it seems to work well for the weight of the car, 1.37 on the back wheels and 1.32 when it's not, I'd be surprised if it made over 920 on a dyno.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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