I don't know how you measured those numbers. If it was done with a clock gauge via the rockers I'd say the cam is in pretty good order bearing in mind rocker bush wear and similar factors. You can only really be certain on the cam wear and condition by looking at it and mic'ing up the lobes. The faces of the followers needs checking too and these must go back on the cam lobe that it has run in on.
There is nothing wrong with the A cam. In Europe it's normally paired with a single carb and carried on right until the end of B18/20 production. Yes it is a soft cam with very little top end performance. Nothing left after about 4.5k rpm. What it does do is allow easy town work in top from about 25 mph upwards and is smooth and quiet. Good torque low down and with the 4.56 in the 220 will be useful if you are touring heavily loaded. Gearing in the wagon will mean it's noisy over about 65 mph anyway which is why fitting an overdrive is the best bang for the buck you can get. Although some say there are 4.10 diff gears available via Jeep sources it's not an easy fix and I've never actually seen anyone with it fitted.
K cam is a better choice than the C cam with new followers of course. You will need to up the compression ratio a bit to give it some help but not too much if you want to keep using regular gas. It sounds as if you have a fairly early car so could have the single outlet exhaust manifold. Changing this to the later twin outlet type will give you an immediate 2-3 bhp even with an A cam , maybe a little more with a K. Does mean you'll at least have to fit a new twin pipe front exhaust section. A Simons/Jetex system is a good option.
Keep us updated.

D cam came with the D-Jet. K cam came with the K-Jet.