You don't have to buy a thing different. I'm sure it's not a tooth off if it's running. You don't get it and you never will so have fun with what you have! That's what it's all about anyway, no matter what anyone thinks.
I suppose the set I have could adjust +4 or -4 degrees If I wanted to reset it all. But since it's running well, I don't see the point in pulling off the cover....spending money on degree wheels and $40 on new seals to reset it. Plus, in my experience, you never get quite as good a seal when you replace the cover with Oil pan in place, as you do when you put cover on first, and then install the pan like I did with engine on the stand.
Your advice has given me quite a bit to research and ponder. I've got a buddy whose 318, '88 d-150 just crapped again.......might be a plastic tooth chain issue, so I will get a chance to mess around with Cam settings again soon.