20+ years of "Building 904/727 for drag racing use"

Thank you for coming back and participating in the forum and bestowing your knowledge on us!
I've rebuilt a 727 and a 904 with good success. Both of which I put trans go shift kits in along the way... For me it's mostly changing the clutch packs and the lip seals...
I'm on here all the time encouraging people to do the rebuild their shelves..
My question would be first a recommendation for a rebuild kit? Whether it be for mild or wild and why you would think so?
I say this because there's many more people on here that are not drag racing and I feel a lot of times that there really isn't nothing more special they need than just giving it a fresh rebuild..
And also if going a little more to the wild side in both transmissions what would be your first upgrades and why?.. maybe where a guy doesn't want to go full-blown race build but just add a few things in there that will add to longevity and good performance...
Thank you very much for your time as I know it's valuable...