The '64Dog has a 4-speed with synchros in only 3rd and 4th. I've been looking for a replacement clutch release bearing and was trying to find what other trucks may have used this tranny. After barking up several wrong trees, I found out that it's a New Process 420. (For years I thought it was an SM420, WRONG!)

Maybe you understand the reference to dope now.

I can find bearings and gaskets, but synchros seem to be impossible to find. Does anyone have a lead on them?

Thanks,
R.