Cam upgrade for my truck, '72 D200 with a 360

Wiki says Ft.Collins is at 1525m/ 5000ft elevation.
If that is true, then;

IMO,
That's a really big problem right there. A bigger cam will with a later than stock ICA, and Stock compression ratio, will be a HUGE disappointment. 8/1 Scr is not gonna cut it.
The next biggest problems,
IMO,
are the; 3.55s/33s/ and stock stall.
Those are a really big problem. The bigger cam with the later closing intake, will just make things worse; IMO forget the cam swap. Your cylinder pressure is already sadly lacking, why make it even worse.

Your new cam, with no other changes, will START to wake up in the range of 3200 to 3600. That maths out to 36 to 41 mph.
A lil below that range the power is likely to be LESS than it currently is. At the stock stall to say 2800, the power WILL be less, not may be.

Your first go-to for this sad situation, is stall. Yur gonna have to do it anyway with a bigger cam so just do it first.
Your Second go-to is gears; Yur gonna have to change them anyway after the new cam is in, so you might as well just do it first.
With those 33" tires, you need 15 to 20% more rear gear, say 4.30s; and at least a 2800 stall.
This will get you something like 30% more torque multiplication at zero mph, something no cam, can ever make happen, with no other changes. The stall will keep working for you out to about the torque peak, and the gears will never quit working for you.
But
A 110LSA HFTcam, in the range you are shopping in, will only work for you over a very narrow rpm range, maybe 1500 to 1800 rpm. And when you pull the 1-2 shift, with the factory TC/3.55s, the rpm will fall right off the cam, and there you are stuck in la-la land again, until the cam wakes up at say 4000 rpm/Second gear/70mph. But with your very low cylinder pressure, she'll just make a lotta noise.
Your 33s are making the 3.55s feel like 2.85s with 26.5 tires Those gears are keeping your engine at low rpm forever...... and your stock stall is just not pulling.
Until you fix your pressure-shortage, I recommend 4.30s for 33s; 65mph~2850 at zero-slip, perhaps 2960 on the tach. Those 4.30s with 33s will feel like 3.45s with 26.5s would.

If you have to keep the 33s/3.55s, then you have to fix your pressure problem first, and yur still gonna need a higher-stall TC.

Or you could just go BB, which at 5000ft, is what I would do.

Sorry but at 5000ft elevation, these are my opinions.

I know you only asked for an opinion on a cam upgrade, but I call it like I see it.

It runs surprisingly well for the altitude and low compression in a 4600-lb truck with tall-ish gearing; really gets up and goes from a stop, 0-60 is under 10 seconds. So you're saying there's no possible modern cam profile that can retain any level of bottom-end torque the way a 50+ year old economy cam profile can? Like I said in post #18, the cam I have my eye on has basically the same advertised duration as a 360 2-bbl and since it's ground advanced 4* it has an even earlier IVC event than stock.

I want to swap the cam and lifters as a maintenance job since this is the original engine to the truck from 1972 with 128,000 miles but I feel like just putting in another factory replacement 2-bbl or 4-bbl 360 cam would be a waste of time. If I'm going to go through the trouble I want it to be better, and not just a few HP from having not-worn cam lobes.