Crane 66970-1 on my Howards hydraulic roller. 2 years and 4,500 miles of street/strip use. I pulled it apart last fall and both the cam gear and distributor gear look new.

They do recommend using only with a standard volume and pressure pump. Not an issue for me.

'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.