The FE manual transmission bellhousing that I am currently using on my 59, is the early, long starter version, with only the narrow transmission pattern. What has me confused, is the casting number, as it does not have either the 3 letter "Exx" style prefix that was used in 58 and earlier, the "575" "boxcar" numbering that most of my original 59 engine parts had, or the later, and still in us "B9" C0" "D1" code. The casting number is CAK 6394 C, which doesn`t match any Ford casting system that I am familiar with, and a casting date of 0K4, which is October 4th 1960, for for a 1961 model year vehicle. Anybody familiar with that CAK designation? Thanks.