Hi Darryl, here is a pic of the Kirby 14" taken a while back before it was stripped.
[Linked Image]

I'll drag the Briggs powered machine out tomorrow and grab a pic. I agree that the 14" must have disappeared during the mid 70's. It's easy to pick a later Briggs as they changed logo and decals on the engines by 79. I've never seen a 14" with the later looking engine.