One of my favourite cars to drive was my (former) neighbour's lotus Elise 200+/- hp out of a Toyota engine.
Sweet, Sweet drive... And given good fortune I'll add one to my stable.
BUT That said, it didn't stop me from putting a 600+hp/tq engine in the cobra...
Why?
Because (for me) a cobra is all about the engine.
Again For me, It's about lifting he bonnet and seeing an old school piece of machinery, that can naturally aspirated, can produce more power than most anything else on the road today, and can be fixed with simple tools, a screwdriver and spanner, in keeping with the theme of what is a "Cobra"
If I wanted a coyote Id have bought a new GT falcon (Google it) or if I wanted a Windsor Id have bought a mustang, or built a 289 or fia.
You've got to decide what YOU want to see when you pop the hood.
What gets YOU excited?
What are YOUR goals/plans/desires for this car?
The only right answer is what tickles YOUR fancy
Good luck with it and enjoy the journey