Suspension upgrades ,the best route

Waht are you wanting to do with this car up there in BC? Road race? Fast cruise? Will you be running the road up to and down from Tofino? (That is a different setup! Think 'rally car' with lots of suspension travel!) Reveal something about what you want to do with the car.

BTW...the 'no bump steer' aspect is not inherent with the coilovers; it is a function of the control arm lengths and angles. (And the right bumpsteer is desirable; study the control arm angles on an F1 or Indy car....they are a certain way for a reason.)

Easier tuning with coilovers: yes. But having rallied on coilover struts, once the spring rate is dialed in, usually you only change the ride height. (Well, you might change spring rates when going to snow rallies or ice racing for example... not what many Mopar guys ever do!)

IMO, the Mopar T-bar front is a pretty good stock spring system. Least amount of unsprung weight. Mod the control arm lengths and angles and mount points if you want to optimize, but that is a step beyond what most want to do. IMO, I would ditch the rear leafs and re-arrange the rear suspension with track bar and 3 or 4 link before I would mess with the front too much.

But on a budget, neither makes much sense, IMO. Tires, shocks, anti-sway bars, and springs first will get most guys/gals to where they are pretty happy.