Propshaft seal, Chrysler racing gearcase

[RTM]

Anyone know where I can buy a propshaft seal for my Chrysler racing gearcase?
The part #is 320146. I heard there may be back to back seals. I`m afraid to remove the old one and try to match it up at a bearing house, if I can`t find one then I`m screwed. I only run this motor at the AOMCI meets, and as of now I drain and change the oil after every run.
Rich

[hydroplay]

Most any designer will choose to use off the shelf parts for things like bearings and seals unless there is some compelling reason for a special part. I'm guessing that the Chrysler gearcase was such a limited design that it uses standard size seals. You can measure the shaft diameter and maybe get the diameter of the bore the seal fits into and go to a bearing supply shop and see what they have before you open it up. But then, oil is still cheap to replace every time you run it.

[RTM]

A member of AOMCI E-Mailed me with the correct part #9822 oil seal. Napa ordered me two, one for a spare. It looks like it will fit.

Rich