Original motor? Which one is that?
From what I have read it I thought it had at least 3 "original" engines during testing, not counting any and all installed since then.
I am guessing you mean the alloy 390 since it was special?
But, wasn't the first engine Miles installed in it an iron 427 that proved to be way too heavy?
And that was why the car got the nickname "The Turd".
After that came the Alloy 390 and the preliminary chassis design for the second generation Cobra that was supposed to get the 390 and a 3" longer wheelbase along with coil springs 4" frame ladder tubes, etc.
I am no history expert on the car so maybe you researchers can chime in with accurate engine details.
I really like the clam shell body design front and rear. Unique...
I will be following the auction with great interest!