He did a vac advance distributor for me for the 512" car, and it worked great, but I haven't tried his box.
For the hot rods & race cars, my default has been a rebuilt & curved MP dist, the old-style MSD6AL, and the F150 epoxy coil.
I had a RevNator box in one car and swapping it for a good OEM box made no difference.
That's a website - and/or a conversation - that was full of hype but no real tech.

I'll be interested to see how the FBO box works out.
And yessir, that's a proper engine compartment