Hi Mark,
913778 is identical to Chrysler #s 705308, 927704 and
928161.
This is a tapered cone with a 2" ID, 1.193 width and .14 chamfer
I have one Chrysler parts book covering from 1954 WAY back
and NONE of these numbers are in this book nor any later book through
'61.
My international bearing guide shows about 30 interchanges with other
manufacturers though so it is a heavily used bearing.
The most common number used for it is 3780 in brands: ABC, Bower, Koyo,
L&S, Timken and Tyson so any parts house should be able to look up 3780 and
give you the Chrysler application.
Wayne
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