For some time, I have thought there should be two new "member favorites" in this forum. Both related to lessons-learned. My thought is that this could really benefit anybody building a car, and give them a single place to look. One thread would be things you did which you now wish you had done differently, and the other would be experiments you tried that were successful.
So, to see if there is any interest, I'll start with things that I would do differently.
I recommend against using the Ford-style clutch cable. Mine stretches, with only a heavy-duty Ford clutch, and requires adjusting every 500 miles. Hydraulic would have been better.
I recommend against using a stock-width 8.8 axle. It radically reduces your choice of wheels, and can turn that part of the build into a real chore.
I found the turn-signals on the Ididit steering-column to be a hassle. Too stiff to engage/disengage, and trips 'off' unreliably.