Did your Kohler K321AQS happen to have balance gears? My later model 1450 did so if fact have them. Now would be the time to remove those at all this oil pan conversation.
My early 1450 is my pride and joy! I have done the cradle mod, went with genuine iso replacements, up graded to the cast deep sump pan, and replaced the rag joints on both ends of the drive line as well as a new cooling fan.
While I was there, I removed any slop from the front axel pivot pin, and rebuilt/installed the 606 nice bearing up grade to the Ross assembly.
Just a few things I did while it makes sense at the point of repair. I enjoy the thread.
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