I haven't done those specific forks, but I've rebuilt several '70s and '80s damper rod type forks, and they're really not too hard. There's usually an allen head bolt recessed in the slider above the axle mount. The easiest way to remove them is with an impact wrench, being absolutly sure you have the correct size socket, and that the socket is fully engaged in the bolt, because if you strip that head, you're done. Also, you should have the fork in the triple clamp to loosen the top nut, otherwise you'll look like a monkey f***ing a football trying to loosen it.
The rest is easy.
FR
The rest is easy.
FR