Not that I am aware of.
the computer will need to be fooled, otherwise you can get it to bolt up I am sure, you likely will not be able to use the AWD t case anymore behind the 4x4 version of the 5 speed trans...
You will need alot of parts and you will have alot of wiring to do (3 position clutch switch, remove auto trans control wires if you are **** like me, and re wire the trans nuetral safety and reverse sensors, etc)
The shifter will come through where your Gen II likely has a center console, something to consider, I am betting the parts from a 5 speed gen II would likely work with your new trans as far as pedal assembly, boot, center console, etc but who knows if the shifter will be in the same spot, probably close.
the Gen II 5 speed pedal and master cyylinder were made for the V6 slave cylinder, hopefully the master will still drive your v8 slave.
Conversions like this ALWAYS have bugs that need to be addressed for sure.
I dont see anything wrong with the 4r70w auto, but a 5 speed would be alot of fun to drive!
Chief34 has a 5 speed in his 5.0l Powered gen I, but I believe he has a Mustang computer and distributor