Timco has a solution so I asked him if he would help us. It is an old thread so he may not see it ,so here is a copy.
Timco,
Thank you for explaining this modification to fix the oil leak from the shaft.Seems like a good "while you are already in there " job.
Do you have a recommendation for
which specific bearing to use to replace the bronze bushing ? As you mentioned, the best possible oil seal is the trick.
As BYP suggested the CMS Motorsports Shift Arrester is another good upgrade - assuming the 2nd gear inspection passes.
https://californiamotorsports.net/products/cms-996-shift-arrester