[Michael C Henry]

The C6 is part of the part number "C"denotes decade (1960-1969) and the "6" is the year 1966 it was introduced into production. The 66 version used a higher hydraulic operating presures 67 and later presures were lowered. I adapted a C6 into a 63 1/2 Gallaxy behind a 428. The C6 oilpan extended into rear area where the privious Cruise-a-matic trans mount was located. I had to build a new crossmamber to accomodate. The 428 takes its own counter weighted flywheels, but the the rest of the FE family of engines 332 ,352, 390, 427, and the Mercury configurations use the same flywheels depending on which transmission you need to match. So a C6 automatic flywheel for a 428 is different from the the rest of the C6 flywheels for the rest of the FE amily of engines. 1966 was the year Ford also changed the number of teeth on the flywheel and starter style.
That tranmission I used was built and the linkage (throttle presure and kickdown) was adjusted perfectly. I could get the transmission to upshift exactly when I wanted it to by quickly lifting the accelerater slightly and stepping back into it. I later had to convert that car to a 352 and had to buy another flywheel (66 and up 352 engine C6trans).