Not Ranked
I think this car is a space frame model which is eariler than the current production mono cars. So, the comparison you have on the auction for the car doesn't relate since the prices you have are for a mono frame. Futhermore, you've got UK prices, which are higher than US prices. I like space frames, some do not thinking they are getting something more original.
In any case, there have been a few space frames like this one go for $71-75k with a much better performing engine combiations in the form of indivdual runner fuel injection system. Wayne Presely's car is like a I described and he was offering it for $72k.
So, I would say in the neighborhood of $60-68k given the engine is quite unknown and appears to be a stock block 302 with a carb on top.
R
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Ron
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