Plenty of guys local to me here that can do it. If you get a measurement from the middle of the u joint on the output of the transmission to the center of the carrier bearing you can get it shortened to the correct length while you’re here
Aha! I'm an idiot...Front section of the rear two piece drive shaft
Have you messed with your fuel adjustment yet? How much boost are you seeing?
Has the engine been studded or are they stock head bolts?