Searched through the posts for the answer to this question - apologies in advance if it's been answered before.  I'm looking through my copy of the club microfiche, and the typical page has a couple of column headings I'm trying to decipher.  The first column is headed with "S", and there is an "ICA" column, with "N" and "F" sub-columns.  What do these columns indicate?

Thanks - btw, I highly recommend the club microfiche, Mike did a nice job with the scans.  The web browsing doesn't work with my 15+ year old CD copy, at least on my MacBook Pro, but the PDF files are easy enough to browse without it.

The ICA column refers to parts interchangeability, the attached pages from the 1970 520/521 pickup 1970 parts book show definitions of all the columns.

HTH Mike

Edited August 24, 20179 yr by CanTechZ

Thanks Mike!