904 slow 2-3 shift, should I be worried?

If I remember correctly the last time I had the pan off was 3 years ago.

THANK YOU for that thread link btw, I knew there had to be a past thread with that kind of info I was looking for but didn't know what keywords to use in the search tool. I do not have a manual VB, it's a stock late-'70s (non-lockup) unit I modified by drilling out some of the holes in the separator plate and omitting some check balls per @CudaFactHackJob (who sadly seems to no longer be here...??)

I think at bare minimum the pressure regulator on the side of the VB needs to be increased and I could probably reduce the number of turns out for the front band adjustment. I don't remember adjusting the hydraulic pressure screw, if I did mess with it I just made sure it was at factory spec when the VB was out. But since I need to drop the pan to do the pressure adjustment I might as well do an air pressure test on the front clutch and if that checks out then install a proper shift kit, a TF-2 is pretty cheap anyway.