Given the components you've laid out, and the outcome of the other beautifull customs you've had built, it would HAVE to be chambered in a classic cartridge. IF it were my build (big if there), I would go a step back to something like the .30-40 US or even the .303 Brit and have the equivalent ballistics of the .30 cal Savage and Winchester rounds. Since it's your build, and between the two rounds mentioned, I would choose the .300 Savage. One of the reasons is that you already have a classic rifle in the pre-64 .308 Winchester Featherweight, and if I had to sell one, it would be the Remington 700. No flies on the .308, but in my mind the rifle you have envisioned deserves something with a bit more "panache".
