So when I was a Kid, I had that AMT kit of the 289 Cobra. 1/25 scale (several of them)
The AMT kit was a 289 Slab side leaf spring car. -- I built that thing soooo many times between 1983 and 1985 or so ( high school , before I discovered girls)
Alternate Versions I remember building ;
1.a 289 based 12 cylinder. -- 2x 289 blocks, front 6 from one , rear 6 from the other with 6 x 2 bbl webbers. (think 330 GT Ferrari engine)
2. Porsche 928 engine , twin turbos, transaxle, and suspension. (has the effect of being big block sized in a smaller scale car.)
3. twin turbo inline 6 made from 2 SVO mustang engines , a cosworth V8 (2 heads made into the DOHC 6 head) and a canted over 20-30 degrees to clear the hood, like a mercedes gullwing / SLR with a custom crafted coil over suspension on all 4's.
4. 308 Ferrari V8 engine with custom super charger and fuel injection.
I do remember pulling the V12 out of the one car and inserting it into a SVO mustang chassis and interior with a GTP mustang race body -- that was the ultimate street car model.
So I have graduated to 1:1 Scale -- SPF 2734 is the first one.