So im thinking of changing out the stock auto in my 85 to a manual. I would like a 6 speed so i was thinking t56?? Anybody who has done this or knows about how long it'll take let me know.

Need custom C Beam adapter
http://www.prostreetcustoms.net/CorvettePage.html
Don't know what flywheel you would use on your '85 2 pce seal engine as most use the F body T56 flywheel on the later 1 pce seal engines