I had to call a couple of guys to check the facts. But as best we can remember:
Three years ago Coach was going to swap his 5.0 EFI for a carb'ed 408. I asked him if he had check the 0-60 time before he pulled the 5.0. He said he had not. He call Jeff and they took a GTECH to a back road at a local industrial park. Coach @ 170 lb., Jeff @ 185 lb., FFR with hard top and a trunk full of stuff about 2500 lb., Wed night in Jan. cold but I don't remember how cold, below 50 degrees, Kumho tires (not a good choice for a Cobra) lots of wheel spin, even in hot weather.
0 to 60 mph in 4.6 to 4.8 seconds.
Coach was mad because FFR advertised something like 3.6. I reminded him of the tires, cold weather and extra weight. The next day they swapped the motors. He never checked the 408, but it was a lot faster. He did buy better tires. He sold the FFR and built a Hurricane with a KC 428 stroker 461 ci with 601 HP. Mickey Thompson tires and he still has a traction problem
Dwight