225 Rebuild from scratch
Doug will get you hooked up with a better than stock cam at a decent price, and will know things like lift and piston clearance with so much milling, etc. He works through a cam grinder and puts a modest mark up on it but not much. It is worth the small price to get his expertise in the matter. Also, he regrinds lifters himself so you can get his reground lifters cheap. So don't bypass that idea because he also does higher $$ work; it will be worth your while IMHO.
He reworked an oil pump for my /6 at a VERY reasonable price, and I am glad for that as the pump gears can be a weak point. And that is another reason to go with his cams.... some of the cams are hard on the oil pump gear IIRC, and he will make sure things are OK there. (If that gear fails, so does your oil pressure.....)
The intakes and carbs you are pursuing are good. Just keep in mind that to use a 4 BBL effectively, you need a cam to work with it. Again, just don't go too big or you will hurt daily driver performance.... go for low RPM torque, not high RPM HP. That mistake gets made over an over on all engine sizes.
IMHO, you are set to start... just add $$ LOL
May I ask what part of TN are you in?