How would you build a low 10’s street car

Isn't the barracuda fastback the heaviest Abody?
At 3600 pounds with driver you will need approximately 600 horsepower to run 10.50.
Now 600 big blocks that are street driven aren't a problem and the formula is easy and straight forward but a 600 hp small block is somthing else, hyper and temperamental come to mind.
And if you want reliability your 600 hp could cost you 9 to 14 k.

I measured a 67 Barracuda Formula S factory A/C car without the under hood A/C components except the condenser (with A/C HVAC still in) in college for a project and it weighed 2940 lbs.... Oh yeah, it also had a factory console shift...