Why do you want to go manual? If i were to chose i would go T5. It is the best if you want overdrive and parts are plentiful. With a stock one you can push 330ftlbs of torque. With some aftermarket parts they can handle around 600. Your stock rear should hold up with some preventative maintenance. There are tons of articles out there on this swap all you have to do is a google search. Ron Morris offers a lot of stuff plus a new universal transmission mount that is pretty bad a**.
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1963 Fairlane 500 4 door 221 V8
1963 Fairlane 500 2 door post 260 V8
1990 Mustang LX 5.0 5 speed
Semper Fi Ford Guy....
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