Ive got a 65 coupe with a C4. The 3rd is annoying on the high way.I would like to put in a 4-5 speed.Preferably a 5.My buddy just pulled his motor out of his 86 Bronco and isnt gonns use his tranny.Im pretty sure its a C6 but no positive.Isnt a C6 a 3 speed also?What tranny from what vehicle would be best to put in it.I dont want a manual.Any ideas?