Shift Kit

Which is why it's a big debate for me.
How hards the TF-2 to install, I've been looking into it and apparantly the supplied directions are a bit iffy. Doesn't seem that hard as long as you keep the parts clean and in order.
Can't find one of those gaskets for a 904, only for 727's.
Edit: I should explain that I can't do the work at home so I use an open source shop near me so I have to drive there, do the work and drive home so I don't want to get stuck over there lol

Their instructions could definetly be better. The TF-2 kit isn't hard to install, but it is more time consuming than other kits but that's because it's a lot more in depth. I have been rebuilding torqueflites for over 30 yrs. and had used nearly every kit on the market and sometimes they worked ok but a lot of the time I had to take it back apart to modify something to get things working like they should. In other words they were inconsistant. I started using trans-go kits about 15 yrs. ago and every single time they have worked great. There is one step that requires removal of the rear servo and installing a spacer and new spring and that's the only hard part at all and it's not really that hard. The mods to the valve body are very simple but like you said you have to keep the parts in order and clean. Look for a gasket for an overdrive trans. model A500 also known as a 42RH or 42RE. They were made from 87 to 2000. The pans are the same on them. If you have trouble finding one let me know.