Back in the mid-60s, I was regularly street racing my '65 Mustang. I ordered it with the K-engine and a Top-loader. Within a few days after getting it, I took the back seat out and replaced it with the fiberglas Shelby deck. I put the Shelby 'glas hood on too. I installed a Cobra intake manifold and a 715 Holley. And a set of Doug's headers and a Mallory ignition and a cam from a local outfit that was available from Gratiot Auto Supply. And finally I installed a Paxton VS 59 blower and did some suspension work. The car weighed 2800 pounds in final form.
There was enough traffic on Telegraph Road that trying to catch a light was a bit difficult but it was fairly easy to come up on a 396 Chevy II and set things up for a roll. I'd choose to be fairly high in first gear, probably about at 45 MPH. But the chevrolet would be into second by that speed and I'd still have usefulness before having to shift. I was running Pirelli Cinturato tires---225-15s as I remember. And a 3.50 gearset in the axle was just right with the close-ratio trans. The Paxton was designed for the FoMoCo racing program and would make more than 20 pounds of boost.
Chevy IIs never had a chance.

KS