Ok, Now I'm confused about what Tranny...

What tranny will bolt right up to my 302 without modification?? I'm trying to get a Tremec TKO 500 but I want to use all my other stuff (clutch, presure plate). What tranny, other then stock T5 will bolt right up without having to run to Autozone and buying anouther 500 $ worth of stuff? And what stuff can I reuse? Clutch, cable and Plate are brand spanking new.
 
A tremec 3550. It's the same as the TKO but maintains the stock input and output shafts. You will need a bellhousing as well...they're cheap.

The other alternative is a Motorsport "Z"trans. It can handle a little more power than the stock t5.
 
http://www.allfordmustangs.com/Detailed/349.shtml

The "Z" Spec

In about 1993 Ford started offering a new service unit to the motorsport crowd. The "Z" spec T-5, also sometimes referred to as "World Class T-5". Most folks, associate the term "World Class" as meaning the best. The T-5z is a 93 Cobra T-5 with 2.95 first gear set and .63 over drive. It has the best of everything. Hardened gears, short throw shifter, steel front bearing retainer, and tapered output shaft bearing. Best of all it has a torque rating of 330ft/lbs. This T-5 can handle up to 450 hp if not drag raced.