I have a coated emperor on the batter and a coated ambassador on the reso.Muffled with felt strip on the reso. Same for my 20". Sounds great!
This is close to what I have done with my D-20 Yamaha 20" bass.
I used the coated emperor batter and the original coated (ambassador weight I think- original Remo made head) on the resonant side. I had to cut a hole since this head did duty as a batter for a while... I would not cut any hole otherwise.
Anyway, I went to the fabric store and got change back from a $5 to get two 36" long X 3" wide strips of wool blend felt cut for me. A lot of felt these days has little to no wool. I think I got a 50% wool/poly blend.
On the reso side I placed the felt behind the logo, so about 1/3 into the head. With a hole cut, it is easy to get a 'papery' sound but this works just fine to avoid that.
On the batter I run the felt very high, just barely on the head. At first it was the same as the front, but the volume of the drum fell way below the toms, so I needed a volume adjustment, and moved it up. Now, I can get either a 'tone-rich' sound (a touch of resonance) by bouncing the beater off the head, or a solid 'THUD by burying the beater in the head, just the way I like it.
If you want the vintage sound, I suggest you stay away from the hi-tech modern heads, but that's my opinion and why I chose the heads I did for my drum. I think Fiberskin heads can sound good on the older, originally calf headed drums too, but otherwise I avoid them.
Set up is important too. The beater should hit the center of the drum, and the beater shaft should be perpendicular to the floor. You may have to raise the front of the drum well off the floor to do this. If this is not an option, get a replacement beater (don't mangle the vintage one!) and bend it forward, so the pedal linkage is perpendicular where the beater strikes.
On my 20" drum, to hit center of the head (which is also key to a good sound with little overtones- just like hitting dead center of your snare vs. the edges) I have the beater on my DW 5000 pedal way low. This had an odd feel to it, but I added the beater shaft weight to the off side of the shaft (below the pivot, opposite the beater) and it feels AWESOME now. This makes the beater feel almost weightless, and you can of course move the weight around as you dial in the beater feel, but this thing as I have it is FAST.
Good luck and let us know how you make out!