Ford serial number = year/model?

[ppache]

Newbie question:

Looked at a Ford which, at first look, appeared to be an 8N (8-lug rear wheels). But the distributer was at the front, and the serial number stamped into the normal location was JC-A-413.

Ideas?

 

[Ultradog MN]

A lot of things could have been changed in the 60 years since that tractor was built.
You could have an industrial engine in there.
One sure way to check if it is an ind. is look on the right side of the block below the governor. Look at the cast boss where the fuel pump would have been mounted. Though some ind. applications used gravity feed and so had no pump, a plate/bolts covering that area is a pretty sure indicator that block was used in an industrial application.