I just did a article on these they often mix up the ch-303 and CH-308 rotors. That taller one is the later one more common in late 70's.
Never saw that make before where did he buy it? Ignition Rotors
Rockauto and others has the United Motor Products says made USA. The rotor is fine if used with cap they make I show. Reason I posted pics of boxes with part numbers.
They must be used a a,set. That rotor used on any other cap will wrecks it ASAP. And I tried many none worked other than the cap United makes.
I put the rotors in the boxes with the caps along with a,note to only use with that cap. And Put them on a shelf for Rainey Day. But have lots of vintage to use before that may ever happen.
