I just finished mounting my aux tranny in a 46 COE, the front driveshaft was about 25" the rear was 36". My aux. tanny is bascially level. Both driveshafts are at aprox. 5 angles. I just winged it and it works good.

Jason
1946 GMC COE
1967 Pontiac Lemans Convertible

http://s1275.photobucket.com/user/jrpontiac/library/?sort=3&page=1