camshaft sprocket fitting

["Carr&Edwards" <scvc70@epix.net>]

Good morning listers,

The mechanic rebuilding the engine for my BN1 is having difficulty
reinstalling the cam sprocket.

The new timing chain tensioner is so "fat" that he cannot raise the sprocket
far enough to line up its center hole with the end of the cam.  We've found
nothing addressing this problem in either the factory service manual or Norman
Nock's book.  Any advice from you all out there?

Thanks!
Sarah Carr
BN1 in Pa.