You are right.....there is more than one polecat..... this one flew under this name in 1980.

The one you noted and most are familiar with was race #6 flew back in 1965 and in the 1970's

this airframe was originally Rickey Rat and Top Turkey. Dates back a while, and has won a lot of races including Reno and Cleveland.

Thought it might be of interest.