The 10 3/4" (11") converter uses a flexplate with a 10" bolt circle, the 11 3/4" (12") uses a flexplate with a 11 1/8" bolt circle.

The 440 used the larger converter, HP 383 used the smaller converter. Redrilling the larger flexplate for the smaller converter is doable but I'd get the correct one.


The INTERNET, the MISinformation superhighway