i have a 250 I-6 out of a 84 1/2-ton thats in my 65 Chevy 1/2-ton and can measuer it but i'm not sure what measure ment you want, are you talking about from the bottom of the hold down flange to the very end of the shaft?
Nate


Link to my photobucket for pics of my vehicles
http://s238.photobucket.com/albums/ff17/OldIronChevy/