273 warm up!

For the Op's goal, I think I would just recommend to stick with a looser TC and more gear, and see how that goes. These are tried and true performance upgrades that are gonna be needed later anyway if he decides to cam it. And who knows; with 40% or maybe 50% more "hit", OP might be happy. This is cheap and easy. This will be the biggest improvement.
Later, headers and a hi-flo exhaust will pave the way for a 4bbl.
Then a cam.
And finally a boost in compression, and another matching cam.
With each additional stage bringing in a bit more torque, then power and finally the entire power band gets shifted.
And each stage costing progressively more money.

If you start with a cam, and 4bbl, and nothing else;OP will be in for a nasty surprise.And now he may have spent his wad.

And I know nobody wants to say it but a stock 318 2bbl was rated 230hp(crank) in 60s/70s, and a 5.2Magnum was rated 230hp (in chassis),back in the 90s. These are drop-ins, almost no mods required. The Magnum is an excellent builder platform,with about 95hp and tons more torque than the 2bbl-273, and is by far, the best bang for the budget-buck.
[FOR SALE] - 318 complete