Something that might interest some.
A recent car through my shop was a 68 Coupe with 4 wheel drums...the BIG ones... 11 inch?
They were also vac BOOSTED.
I was very surprised at how well it stopped.
It got me thinking, back to my ole EJ holden with unboosted drums on all feet, and considering why i ever went HR front and commodore rear discs all round.
It was brake fade.
(this post is gunna go back and forth as my mind plods)
I argue the point of upgrading to discs simply because they are safer. The question on whether you should upgrade discs, can be answered by one fact, how you drive the car. If you drive it hard, then discs are an obvious choice, but if you like to cruise about, then the drums will probably suffice.
If you like to tinker with your car(and only cruise about), then drums are a good choice, as my memory of having them was that they did need attention periodically, to keep them adjusted up properly and in good trim.
If i had a muzzy of my own, you'd find me only ever cruising, so drums would do me fine, the only upgrade i would consider is vac-boosting them.
Of note, this 68, i drove it before i knew it was 4 foot drums...i didn't notice any difficulty.
Jas