Lot's of good advice above...
I think you should determine what you want to use the car for... I assume the 36 Coupe isn't exactly on the light side.
As said you will never get 500-ish HP with that cam... and it also appears to me you want a decent driver and not a race car.
So either adjust your perspective of horsepower and keep it at the 425-450 HP level (which is definitely doable with your parts, except the camshaft),
or step up the game with even more camshaft, a decent converter and a steeper rear end.
