Is there a best model of front drum brake?

I had good luck with both the Yamaha YZ465 and the Honda CR480 set-ups.

Any of them that had, or that you can update to a double leading shoe front brake.

the 83 Hondas had them and with regular service they were pretty decent.

My guess is you'll hear an overwhelming amount of cricket chirps after asking a question like that 😂😂😂

Um,

Why would they?

That's kind of in the same category as converting the rear suspension to twin shocks

Probably not because in most vintage organizations the forks themselves would not be period correct and not allowed.

For hard-core twin shock racing, the Suzook set-up is often the way to go. The pix below are from Farleigh Castle, but there is a pretty well-attended twin shock /Evo series over there, so the tech gets developed quite aggressively. Just ask Dubach and Brown about how trick these bikes can get.. And there are lots of guys doing the one-to-two conversion. The Suzuki's below are '84's, lots of Maicos use '82 frames, and the Hondas below are 84's and '87s.

Also, not all double-leading shoe hubs are equal. Yamaha usually works well, Husky not so much.

Well, I've seen $20,000 Hodaka 100s....so, nothing surprises me!

Don't recommend the Bultaco front hub. No surprise there...

There is a 490 Maico with the KYB conventional setup around here, works pretty well.

As someone said, Honda and Yamaha DLS are the class leaders. But if your racing organizations allow it, just about any disc is better.

83 yz250s had DLS front brakes

I grew up with drum brakes, Yamaha had them dialed in.

KTM's double leading shoe's from the mid 80's were really strong. Strong enough that I could do nose wheelies on their 125's back then. They were better than KTM's first front disc units.