IMHO, your situation personifies the benefits to something like this.
https://www.diyautotune.com/product/ampd-microsquirt/
You can control your old commander set up for fuel, and use wasted CNP(or lockout your distributor and control it) for fully tuneable spark tables. Has enough input for a flex sensor if you're so inclined. The Tunerstudio tuning software is very good, and can provide rev limiter capabilities. Amongst other stuff. It's priced very reasonably for the included features IMO. And then there's the data logging. Very powerful tool there.
ETA: It will self tune, but is fully programmable as well. Pick your poison there.
This would be batch or bank fired for a V8. If you wanna go sequential, they have an option for that, but at about twice the cost. (MS3X)