I have been down this T5 route, here are all the links I collected... Read thru them. Lots of them have info about speedo changes and tailshaft swaps.


Dagenham 4 speed
Transmission on 1960s Ford and Mercury Models, from Clymer Publications
maintenance and repair handbooks for Ford 1960-64]


G-Force Transmissions and Long Shifters

Identify T5 tag

Identifying and Assembling a T5 5 Speed

Identifying and Assembling a T5 5
Speed


Modern
Driveline - Classic Mustang T5 swaps, Tremec Conversions, also Cougars. Falcons, Ford Ranger swaps


Modern
Driveline - T5 History


Muncie 4 ~
ChevelleStuff.com


T5 Swap, T5
Conversion, Mustang T5 Swap, Auto to Manual Transmission -FordMuscle.com


T5 tech1

T5 trans Building a Sports car

T5-Transmission