Front end upgrades 74 dart 225 slant 6

I went in for an alignment today and as suspected I will be looking at replacing parts in the future. We starting discussing various options as to what to plan for and i'm looking for opinions on what is available and what the best options for long term would be.

Its currently got a 225 slant 6 in it, and I plan to keep it in there, not looking into replacing it with anything at this point or for a very long time yet (its a daily driver) but I am interested to know what would be best, I mean who knows. Maybe 10 years from now I will decide to swap it, maybe a windfall of money will bestow me and I will not give a crap about fuel ;).

Anyways interested to know what all your opinions are, I'd like to start pricing things out and planning for the future, its going to need it inevitably. Right now all I need to do (apparently) is replace the upper arm bushings, other then that everything looks ok for the time being.