It sat outside in Denver for 35 years? Yikes!
That means it had 6 feet of snow on it during the great Christmas Eve storm of December 1982!
Ok, if it turns over and has compression, here is a list:
Flush tank, fuel lines, dismantle and clean petcock.
Pull carbs, clean, check for corrosion. Check boots for cracks.
Drain whatever oil is in there. Refill. Pull filters, replace.
Pull spark plugs, squirt oil in cylinders. If plugs look good, reuse.
Check plug leads for cracks, replace if so.
Pull valve inspection caps, squirt oil on valve train/springs.
Clean battery cables, be prepared to replace. New battery.
Check points for pitting, good chance they are toast anyway.
Check static timing. Cables will be seized, remove and see if you can free them, oil them if so. If not, replace.
Clutch will be gummed up, but maybe see if she runs first before you go deep into clutch land.
Make sure you have spark before putting fuel to the fire. All things considering, she should run.
After you get her going, your facing brakes, fork, chain, shocks etc.
Bringing an old soldier back form the dead is very gratifying, but takes some time and work......