An “explosion of sparks?”

Yep. 6-speed 4.3 in the track car (NA) and 5-speed 4.1 in the daily (NB).

The extra torque from the 6 speed is a significant advantage over the 5 speed in a track environment, especially at stock power levels.

Put NA door cards with pull straps for arm room. Swap in an early 1.6 dash for leg room.