[reg45]

So! Was he “click” or “clack”?

[raccoonradio]

Tough to say; Wikipedia lists them as:
>>by brothers Tom and Ray Magliozzi, known also as Click and Clack, the Tappet Brothers.

I will assume Tom, the elder (by 12 years) was Click and Ray is Clack, but given their irreverance on and off air, it probably is no big deal who was who :)