This is what I would do for a level one upgrade.
Dual exhaust off of the manifolds with an H pipe.
An early factory 4bbl intake.
Carb of choice. I used a Edelbrock 600
A cam change would depend on what the gear ratio is, tire size, converter stall, compression ratio & weight of vehicle. If the vehicle is heavy, as a truck is, a duration @ .050 of no greater than 210. That will work with a low compression engine, Hwy gears and a tall tire. I’m guessing your tires are about 28 inches.
A “Stage II” kind of build would move to headers, 2-1/2 exhaust piping, H pipe, aluminum intake, 750 carb, slightly larger camshaft not more than 224@050. 3.55 minimum gear ratio, 3.90’s are better. Change the torque converter. Burn rubber!
An ingnition upgrade, air cleaner upgrade would be good.