I dont think the driveshaft or rear end would need to be replaced if you go with the larger engine swap. I'd be more worried about getting traction than breaking the rear. There is some 4x4 Twin Turbo V6 Tacoma out there running 11's and it has a factory drivetrain, just a modded transmission.
1998 Toyota Tacoma SR5 1/4 mile Drag Racing timeslip specs 0-60 - DragTimes.com
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PSI Racing , Drag Racing Turbos Headers ......