Sounds like a good streetable setup.
If I were going to make one suggestion it would be to go with a bit larger cam even with the high gearing.
You have more cubic inches to deal with than a 350, so a .425 lift is 'very' mild. Consider looking at something in the .450 range. (mild for a 400sbc) This will give you some added power with your setup without comprimising it's streetability.