Ding ding ding!!! We have a winner!It gets a bad rap because people add a 200HP tune and then drive like a 16 year old at a drag strip.... then complain all over the web what a piece of junk it is when it doesn't hold up to that. That's the true story...
The 68 is a PERFECTLY fine transmission that more often than not provides a long reliable service life.
Is it perfect? No. The valvebody would be the biggest source of “issue” and that’s easy enough to remedy for not much over a grand. It can have the potential to bleed pressure but it’s known how to take care of it.
Like said, the CP4 is the greatest source of potential issue and even that is overblown. I would try to knock off about 3k for the pump and just replace myself, but that’s me.