Fold down rear seat vs body stiffness
They had cages and were intended to have cages.
I asked Bob Tarrozzi why they didn't pick a 68 Barracuda notchback. He said he was told which cars to do. He figures the fastback was picked for marketability as it was a sportier "look".
There's always a controversy between SS Dart vs. SS Barracuda for what's the best car with all kinds of arguements and points.
the fastback folding rear seat and mechanisms weigh more than a coupe rear seat. Of course that doesn't matter for a 68 SS car and they removed the rear seat anyways.
When they first started SCCA Trans Am, Ford choose Notchback Mustangs from 66-68. Even though Shelby was the factory sponsored team and they sold Shelby Mustang Fastbacks.
The 64 and 65 Hemi Super Stock were post cars. It's generally accepted post cars are stiffer. Probably very minor, but stiffer.
