Firstly - yeah, it was fun. The first time I drove it, I launched in 3rd gear in stead of 1st... and didn't even notice, until I realized I only had 1 upshift to make.
Secondly, thanks. However, I have to say, even though I've never driven a real Superbird - the one in the Seattle license test is totally FUBARed. I've driven a real Charger, and it's nothing like that, certainly not on anything but the cheapest of bargain-bin bias ply tires.
Thirdly, yes. Drag racing (and street racing) was king in those days, and quarter-mile time was the crown. Most manufacturers had a huge-displacement 'bigblock' (6.5-7.5 litres) V8 option, breathing through a giant 4-barrel carb - often with active air supply such as scoops or cowl induction - coupled with a manual transmission and a very short limited-slip diff. Drag racers snapped these beasts up and made them even more insane.
Road racers, such as the Trans Am series (the SCCA races, not the Pontiac model) tended to use the 'smallblock', relatively smaller-displacement engines for better chassis balance. The Penske Trans Am Camaros ran a 302 cid version of the 327; Ford's 'Boss 302' Mustangs were competitive, and the AAR Cuda used a 340 after the 5.0 litre rule was raised.