The SAFC is only going to act as a 'band-aid' to the issue as it will simulate voltage to trick the ECU into leaning it out. Once the ECU plays catchup to this , you'll be back to exactly where you were.

I had an SAFC in my car prior to MS2 and that's my take from using it. You can still use it but it's not going to be as effective.

The car will only run as good as its limiting factor. In this case, it is the ECU. You need full control, in other words Megasquirt or another form of fuel control or at the very least an AFX ECU if you can find one of those still.

Otherwise just deal with it or put the stock cams back in.

I contributed to the Wiki.