BDA, Thanks for all the insights and information. I had already contacted Andy when I bought the 72 Europa and got my letter and certificate of provenance (see below). This is my 6th Lotus and the guys in Hethel know of me (a factory visit, track day at the factory, Classic Team Lotus shop tour along with a number of dinners with Bob Dance over the years). Thanks again for all the parts suppliers, I've been dealing with these guys for years and luckily RD Enterprises is located an hour from my house so on nice days I can drive over for parts ;-)
The question of the side body trim is a bit perplexing as there doesn't seem to be any area that this would have been screwed in (no holes). How was it attached? Arizona suggests the early twin cams did not have the trim panel.
And the question on big valve or not is another interesting question. My twin cam does not have the "Big Valve" lettering on the valve cover. Roger, your explanation is another detail I was unaware of. Always something new to learn with Lotus.
I have reached back to Andy to see if he can answer these questions. Let's see what he comes up with.
By the way, anyone know if Lotus Central in Detroit is still in business (under another name) or has any old records of the cars they sold?