Good advice above.
My recommendation for FEs
1 - Headers and a good dual 2.5 inch exhaust (manifolds rob more power than anything)
2 - Recurve the distributor (wont change WOT power, but will make it run stronger on the street)
3 - Intake manifold and carb (Not in your case, the CJ manifold is VERY good, just heavy, so you can skip this step unless you want an alum intake, then pick carefully)
4 - Gears (assuming you dont already have 3.50+)
5 - A modern cam to match the use of the car
So when you look at what you have, really its a set of headers and a recurve first, then build from there
If you look at my sig, we can bring you as far as the budget lets you, but you'll be amazed at what just the headers and a recurve will do.
70 Sportsroof, 427 FE, 489 cid, 10.7:1, Erson valvetrain, KC ported Edelbrock heads, modified Massflo EFI, TKO-600, 31 spline 4.10, A/C.
71 F100 4x4 shortbed 445 FE with all the goodies
08 F250 Powerstroke 4x4 XLT crew cab
07 HD Street Glide, Black, 96 cid 6 speed EFI