engine stamp painting

[nuch_ss396]

John,

Regarding the BBC's @ Tonawanda, the NCRS guys told me that
the suffix codes were written on the side of the blocks
( somewhere ), in crayon (upside down) and then transferred to
the pad before the heads were installed.

So, how did they know which engines got L/89? Did the
written, then subsequently stamped codes tell them, or
did a particular engine get "tagged" for L/89 ahead of
time? The painting process for L/89 BBC's had to be
somewhat special in that there wasn't much, if any
overspray on the aluminum heads. How was that accomplished?
I have as of yet to get a definitive answer to that question.

Steve