High Compression 390

ICA is IntakeClosingAngle
I like that cam for this combo, if you need to run down at 1000.
The ICA is
Intake duration/2 less the installed centerline(ICL), add 360 then subtract the intake duration. The number you get, you then subtract from 180 to get the ICA.

Ok so 268/2 less 106 is 28. Then add 360, and subtract 268 is 120. Subtracting that from 180 yields an ICA of 60*, and that is close to perfect.
Plugging that into the Wallace at 11.5Scr, we get 178psi@169VP at 5000ft, and falling to 156psi@149VP by 9000, and rising to 200psi/190VP at 1000.
Now 200psi is about the limit for pumpgas and aluminum heads; and in the stroker, the 106ICL is not needed obviously, so you could install it at say 109, for an ICA of 63* and that would pull the pressure back to 194psi@180VP at 1000ft, and so now you are good to go WOT at 1000ft.
Now check this out
At 9000 you can run 87 gas.
At 5000 I still run 87, you might start out with 89
At 1000 she's gonna want 91 or better,
depending in the tune. With the .038 Q and aluminums, and if you have a proper cooling system, Ima thinking she will run 32 to 34 degrees power-timing, which is all aluminum heads and tight-Q usually ask for. In any case with that 268 cam and 390 cubes,194psi, and at 1000ft ; you will have a real honey of a stump puller and a pretty good race truck, if it had an A833. With the NP435 shifting at 6500 is gonna be exciting; make sure you have a rev-limiter. The synchros in that trans were built for about half that rpm. The friggin cluster weighs about what my wife did when I met her. The gears are brutishly heavy, and the synchros are built inside out. Get a soft clutch disc with plenty of spring in the hub cuz those heavy gears are gonna want to tear it up if you're not easy on the pedal.
Oh wait, yur not gonna have traction anyway so any old clutch will do,so long as it doesn't slip when you lay on the throttle,lol.
On paper this looks dynomite.