Brandnewstang, welcome to one of the two most enjoyable psychoses (other is falling in love). Greetings from Lebanon Valley Dragway, where in a couple hours Ford Day is the first event of the year for us Ford guys.
I've been at this a while (since 1969), but a lot of the other guys will have better ideas. I'd reverse your order - unless money is not an issue - the tuner provides all sorts of future adjustments, as well as hours and years of entertainment. You can be satisfied for some time with these two mods, I'd predict. You may want to ponder a shifter - aftermarket ones really help this six-speed's factory one. Then at some point you'll want some rear suspension upgrades (control arms), and maybe, later on, gears.
This board does not have a lot of head cases on it - you've come to the right place.