[sYc]

Actually, late '60s, early '70s Yenko was concerned with paperwork as well as the other stuff you mention, as to sell his cars in volume he needed to get them approved by various sanctioning bodies, such as SCCA, NHRA, AHRA, and others. If not for Yenko keeping much of the paperwork associated with his cars, as well as keeping the paperwork until it could be rescued by others, Yenko owners might be facing a much tougher time documenting their cars, such as Motion, Harrell, etc.


Judging by what we have, some useful, some just interesting reading, and what I know others have, appears Yenko documented ( and saved) everything,

Example of interesting, Don once worked with Weslake out of England in an effort to produce a better SBC cylinder head?