[TR] TR4 Early Valve Cover Needed

[Randall]

> What say the TR-4 spare parts catalogue?

Not much, that I can see.  My reprint of the 2nd edition lists 3 different
covers, but nothing about a brass plug.

Cover assembly 304677 and cap 113569 are listed up to CT14233E only;

then there is a listing for cover 306527 plus cap 138176 "closed circuit
breather" but no range;

then cover 305614 plus cap 113569, plug 129077, adapter 129077 and washer
WF0511 are listed from CT14234E and future.  

However, plug 129077 is used as the block water drain plug on later TR6, and
so I don't believe it is brass nor as large as the brass plug seen in many
early valve covers.  WF0511 has an internal bore of 1/2", perhaps someone
can verify that their brass plug is larger than that?

I also found TSB T-63-68 which seems to imply that cover 306527 is the one
with the tube sticking out to the side, for the pipes that lead to the air
filters.  But it's also listed in my TR4A SPC (where I assume the side pipe
connected to the PCV valve).

-- Randall