Short list (not all inclusive)
- transmission of choice (make sure you get all the shifters and linkage for everything)
- split case
- proper bell housing
- proper pedal bucket
- clutch master and slave
- transmission crossmember
- clutch and flywheel
- front drive-shaft (shorter)
- rear drive shaft (longer)
- associated floor boots and trim
- new radiator (or plug off the cooler if it has one)
- assorted bolts and hardware
- assorted hoses and lines
that is just what I can come up with off the top of my head, but I know there is more to it, those are the big bits, lots of little stuff. The A440F is not a bad box, but it does rob a good amount of power from the 3FE. It is a completely hydraulic/mechanical transmission, so no electrics to go bad on it, just the valve body I have not driven a manual 3FE truck, but from those who have, they say that a manual swap really wakes up the ole' 3FE. My 91 has the same combo and I have considered doing a manual swap, but honestly, I believe for my driving, I am going to have the trans rebuilt, stick a nomad valve body in it and then see what I can do to wake up the 3FE with some head work and go from there. Going to depend on what you want the truck for. I have enough others I can gear grind in, I'm keeping the auto because sometimes I'd rather just drive.
I know several folks that have swapped them and it can be done in your driveway if you have the bits and a pal to help with some of the awkward bits. You do you man, if you just got it, drive it around for a while and decide how much you care for it.