crab distributor - only choice on early 21 stud ?

[Hoop]

Tom Bellfoy, if you are still following this thread, tell us about your car. What condition is it in, and how do you plan to use it?

Curious about your wanting to change the distributor. Are you having problems? Or did someone advise you to change it?

Without knowing more about your car, it's too soon to be making recommendations. Maybe the guy who owned it before you installed an excellent helmet distributor.