On most Ford engines, they never had valve adjustment. And I do not favor Ford or chevy, most people would not know the difference between a bare block 302 and a bare block 350 sitting side by side. I think most engineers went to the same school.
I am not sure why everyone thinks the lifter preload is for camshaft wear. It's to properly push the plunger down in the lifter the preset amount so the lifter works properly.
And when building a engine that is not factory, you sure do need to check this, and add or subtract somewhere to get the lifter preload correct. There are just extra steps on most Ford engines, and even chevy when to a non-adjustable valve train on their famous LS engines.
Without getting too technical, it's very easy to check. Just pretend you are adjusting a chevy
Seriously, just turn the engine around to TDC of the cylinder of your choice, loosen the rocker bolts till you have play in the pushrod, slowly tighten till you have zero play, and then stare at the ratchet and count the turns as you tighten the bolt till it stops. If it took 1/2-3/4 turn, great. 1 turn would probably even work. Beyond that too much, or very much less than 1/2 turn, you are in the iffy zone.