> How do you distinguish between older, newer, two-speed, and other wiper
Look for the Lucas name ;)
58 had a double dome
59-67 was single speed with a dome where the park switch was located.
68 on was a round 2 speed motor mounted on the inner fender when they
went to the later brake pedal box and tandem master cyl.
So if you put the later pedals in a Bugeye, the original wiper motor is
in the way. The later one makes everything easy and gives you 2 speeds.
Slow and very slow.
Toms River, NJ