Hi,
I would highly recommend Bill Piggott's book called the "Collector's Originality Guide". MOSS Motors has it and it sells for $50. The photos and comments are well worth the price. When I redid our car I spent untold hours on the internet searching for pictures and guidance that Bill has put together in his book.
Combine this with on line photos that are available and you should be all set.
I do have some photos I took at a EuroCar Show in Cazenovia, NY of an incredible TR3-A that is just magnificent with some very helpful under the bonnet photos. Contact me at
rgh1506@windstream.net and I'll send them to you.
Well worth the investment and the book is absolutely riveting. Very well done!
Cheers,
Ray