i like the stock PCM for more of a driver/street/strip (especially if the car is already equipped with the harness) like on an LC LX DR, etc.

However to use a stock PCM in 68 cuda. You need
a harness 1000$
a pcm from the dealer $300
a programmer 200-300$
an APP pedal 50$

To use a FAST system i was quoted around 2900-3200 (NOT EZ EFI)

I guess it depends on budget, tuning options,etc.

Most ALL OUT drag cars do not need the driveability functions the stock PCM has.

just stuff to think about...