This article is to determine if your your cocker body is pre2k or 2k+, and nothing more.
------Pre2K------
-bottom of the front where the vert asa is squared
-front block screw is about 1/2"
-------2k+------
-bottom of the front where the vert asa is rounded
-front block screw is about 3/4"
Other ways to determine the year of your cocker is by way of the back block,
pre2k back blocks are 1" thick front to back
2k+ back blocks are 1/2" thick front to back
Pre2k stock wgp bodies only had a "pump arm" groove milled down one side of the body
2k+ stock wgp bodies had a "pump arm" groove milled down both sides of the body.
Now this does not mean that pre2k bodies can't be milled to have charactoristic's or be identical to 2k+ specs..
Kmac
KAPP 98 Autococker Front Block
2k+ front block screw (banjo bolt)
2k+ ccm blank slab body
2k+ body with rounded bottom all the way to the front
Pre2k squared bottom of body
Pre2k body with no "pump arm" groove milled down the side of the body