Yep hydraulic. I was talking to Jim at Racer Brown about having him make an exact copy of it because I pulled the original cam our of the engine, just was rusted. Figured I would see if someone had a NOS one before I had a copy made
I'd be interested to run that on the street with 1.6 arms. I think I could get 30 mpgs with a thermoquad, and a manual trans geared 65=1600 in double overdrive...... lol
If I didn't already have a cam like that I'd beg it.