Who makes the best driveshaft for drag racing applications? Need a strong driveshaft to handle hard 5k and up rpm launches with a 5 speed on my 03 built Mach1. Driveshaft shop? Dynotech Engineering? Strange Engineering? I'm lloking at the Driveshaft shop FDSH16. It says it for automatic 4R70W, they list another shaft also for a automatic 4R70W trans. Can I use the FDSH16 with a 5 speed trans?