Had a set (most likely same) on my old swb cruiser, would have been early/mid 80's. Back when you could only buy Bridgestone Desert Duelers for 15" sunrasya rims.
Have used gas /oil and found them too severe on corrugation and then leak - no good for me. OME were my first early 80's, not much else around. GU-Used Bilstien B6 / 2" lift (with modified valving) provide good handling / control but skip around corrugated corners and also had foam cell. Prefer larger bore oil and remote would be my next choice also.