got a 420 and considering rebuilding, bearing and syncros, any ideal on a parts location. is the rebuild a plus or should i just run it , while it's on the ground would be a good time to do the work. thanks for any input.
tony

They are relatively easy to disassemble and reassemble while you have it out, so I would take a peek. The wear specs and inspection procedure are in the GM transmission manual and can be downloaded from a link in the following page:

http://members.home.net/cglabe1/sm420/sm420.html

Even if you don't want to disassemble it, take the PTO cover off and check for metal chunks on the magnet. Chunks and flakes can be a sign of impending failure, so if you find any you ma want to look further.

Try Novak at this link (http://www.novak-adapt.com/)

thanks to all