Tricarb manifold bolts

["Bruce Starke" <bstarke@redshift.bc.ca>]

Further to my original question about the extra holes in the manifolds, the
openings are blind-ended and don't enter into the the manifold. It does not
look like any bolts were fitted and they are a coarse thread as mentioned by
several listers. Were the early and late tricarb manifolds different in this
regard? The size of the balance tube is bigger on the later tricarbs so the
manifolds are presumably different too.
Thanks for all the help
Bruce Starke
Golden BC