I have a 1966 TVR 400 V8 (Griffith). It does have its original HiPo 289 installed. Ford sold HiPo engines to manufacturers outside the Ford umbrella, and those sold to The Griffith Motorcar Co were supplied by the Ford Industrial Engines (FIE) division. Each engine was shipped with a metal ID plate with 3 fields of information - SERIAL, TYPE and OPTIONS. It's the same type of plate attached to many Ford engines used in farm equipment (tractors).
I was told by Mike Mooney, former employee of Griffith, that in the day the FIE ID plates ended up thrown in a desk drawer never to be used and most all were likely discarded. Fortunately Griffith did transfer the Ford SERIAL information onto their own Griffith Serial Number Tag, so for most Griffiths, the original engine serial number was preserved.
It turns out my car's FIE ID plate was not thrown away, one of only 2 cars I know about that still have their original FIE plate. It survived because it was one of the last 10 Griffiths built, completed entirely under TVR's control (at that point Griffith had gone out of business) and the original owner of my car was given the plate upon purchase and he was meticulous about preserving most everything.
I'd really like to decode the info on the plate but there's little information I can find online to help. Maybe someone on this forum can help me out and look at the numbers and letters and recognize their meaning. The only thing I think I can decode with certainty is the KK at the end of the serial number. I think that stands for 1966.
I have masked out the two number digits after C14 so what I think is the serial number is masked.
Appreciate any help. - Gregg