My way of a mission impossible 318 budget :)

I would stay lower on the numbers for the cam. With a C body you will have to keep the torque in the lower rpm range.
Example; 340 cam with 268/276 429/444 does ok in the old 318’s especially with the stock torque converter and factory gears.
The 2 bl intake will choke your entire engine in all rpms. Imagine an hour glass shape, the thin part in the middle is your 2 bl intake. Try some swap meets in Montreal or abodies for a 318 dual plane 4bl intake. Preferably aftermarket to help the weight of the car and for shipping.
Please post more info and pics on your car.
Year, trans, gears, engine/heads year/cast # ‘s.
The wizards on this site will most definitely help you get the bang for your bucks.