Editing Doug Nash transmission

I am building a '68 Camaro and I already have a 454 that is bored .060" over, an Eagle forged rotating assembly, a .540"/.540" Comp cam and hydraulic lifters, I have a Doug Nash 5 speed with a Long vertigate shifter. I have a Lakewood bellhousing and I've already purchased a Ram billet flywheel, Ram clutch, and a Ram pressure plate. The bearing surface for the throwout bearing on the tranny is about 1.37" OD. My question is what throwout bearing am I going to need to use? I've talked to the tech line at Summit and they have no clue, I called Richmond and they were absolutely no help, and I just want to get this right, so if anybody can help me, I would really appreciate it.

[[File:DOUG NASH 4plus1 RACE TRANS.jpg|thumb|left|350px|Doug Nash 4 plus 1 race tranny]] <br style="clear:both"/>


[[Category:Transmission]]
[[Category:Undeveloped articles]]

REPLY:

You should be able to use a standard big block throw out bearing, the OD of the transmission input shaft bearing retainer should be the same unless it was changed, as it is interchangeable with a Borg & Warner T10's. To be sure call Richmond Transmission support.
http://www.richmondgear.com/01transmissions.html

and

http://www.richmondgear.com/0002pdfs/TRANSMISSIONMANUAL.pdf
Regards, Jose F. Medeiros :)