Brg/bush clearance

Can anyone please tell me what is the clearance between the crank bush/bearing and the gearbox input shaft spigot should be.
The snout is 17mm or .669"

 

Barrelnose, here ya go.
http://forums.chevyhiperformance.com/70/8548083/drivetrain/pilot-shaft-to-bronze-bushing-clearance/

 

So input shaft to pilot bearing?

 

Yes ^^ and thanks Pitman.

 

It seemed to cover the basic needs, Chev or otherwise. You'll want adequate clearance for a grease film. But more is not better.