Hi everyone - thanks for the kind words of encouragement (and sympathy/concern:))
Those TVR "factory" photos are crazy, and such a cool glimpse into the past. I got to tour the Lotus factory in Hethel circa 1998/89 and it was much better, but not orders of magnitude. That reminds me that on the final assembly line there was a yellow over blue Esprit Turbo. Yellow and blue as in the Camel cigarette livery and it was the presentation car for Nelson Piquet. Wish I'd gotten a photo. But, wait, that would have actually meant carrying a camera!!
Anyway, sorry for initiating this drift away from our favorite early British sports cars - those with the engine in the proper location!
I'll follow up in the OT section.
OH, in answer to the question, it has the OE 2.5L straight six sourced from the TR6. But in my case it's still in many pieces and tubs...
Ron