Thanks for all the info. I'm shooting for close to 350 HP if I can. That being said, I don't want to overhaul the whole engine yet though. The previous owner said he had the engine rebuilt 5 years ago, heads machined, bored 03 over, he said it has "a mild cam in there that I'm gonna love," idk the kind of headers it has but I plan to change them and do a custom exhaust set up. He did not drive it very much at all since the rebuild because its kinda of a basket case/ not road safe. Lights dont work etc, all rubber is really bad, driver door doesnt close.... its starts right up tho with no smoke but it is clearly out of tune, kinda hesitant. Basically he lost his job right after doing engine, trans, rear end rebuilding few years ago and had to sell the car now to pay bills. I know the POs word doesnt mean much since he lost the receipts but for what is worth I believe the guy and would rather not start digging into engine replacing internals before I really need to.
I'm gonna sound like an idiot here but it turns out the car actually has the early poly 4 barrel intake casting number 1859229 on it already. Basically I've been at work a lot the last few days and haven't been around the car much. My father used to have a 1965 sport fury with a 383 bb years ago so he knows a bit about mopars. Right after I bought the car a few days ago he took a quick look under the hood and mentioned the intake looked stock and because it has a mr gasket adapter I though the PO might of mikey moused it and put the AFB on the stock 2brrl. Just found out he did NOT, he did it the proper way that you mentioned. I'm at home today so I've had time to look over the car more. I'm going to start a new thread because I have some other questions.