I started down a path of building replicas of cars that meant something to me at the time....so far it's been about 1 per year
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I am not a skilled modeler, nor committed to the art, but it's fun to immerse in the nostalgia.
These kits and my work are nowhere near the detail you're creating.
The 70 LeMans I now own (and keeps me in this forum) is our 2nd, so that's on the to-do list, but there is no exact kit. Kits for 70 GTO are scarce and expensive. I plan to try and modify the nose of a 72 GTO kit. There are also cast "resin" parts sold online that could help. I'd love to have a 1/24 dataway engine for it!
I'd also love to have my LeMans driveable and find a way to get it painted! Something about wishes and horses....
The Ford had a 327 Chevy so I bought a standalone model of the engine and transplanted it. A dataway 400 would look good in any model.
Mike