There's also going to be flex plate, torque converter matching as well as a Lokar (or similar) ATV cable and it's adjustments. Drive shaft will probably need shortened and you'll need the AOD yoke too.

I agree that postings never seem to end with a list telling you to do this and that's all you need to do. But one of the problems is every truck is different. If they told you to cut 4" off your drive shaft and then yours was too short

I've had best luck seeing a post and then PMing the FTE member and asking questions.

But now that you've opened the can of worms we'll be looking for your checklist.