Vikki is correct generally speaking. If drums are gone through and EVERYTHING new, wheel cylinders, spings, clips, shoes etc. on ALL four corners and then properly adjusted, 4-wheel drum is not as bad as most make it out to be.

However, with that being said, I have now owned the following and can offer first hand opinion. My 68 Camaro RS/SS conv. car had rear drum w/ front disc. Nice combo and all worked well and MUCH safer/reliable than my 68 Bird with all four drum with EVERYTHING replaced and all new. Even with new, properly adjusted 4-wheel drums our Bird was never safe when there was even just a bit of water on the ground. Each drum would lock up at different times etc. Very unsafe overall.

Then, when we bought our current vehicle, 67 LeMans, it too had 4-wheel drum. They were all original parts and VERY SCARY! Rather than spending the money to rebuild all 4 I opted for a 4-wheel disc brake system. As mentioned above front disc & rear drum are better than all drum, but 4-wheel disc is 10x better than front disc/rear drum.

So all in all each configuration is better than the next. Personally, now that I have owned all combos, I wouldn't even consider owning another classic car without 4-wheel disc. There is just NO comparrison at all from a safety/reliability standpoint IMO...