NOT FAMILIAR W/ AFCO stuf.
There were 500# springs on the "magnum force front end" coil overs that I bought a few yrs back. I bought 350# springs for tthem and did a few tricks to help it live. The car rides better w/ the liter springs, but so far I have no front end lift at all, even w/ the shocks set in the softest setting. Need more initial bite out of the rear tires for one thing.
Let us know what u end up doing ----------
I would recommend that you contact Viking Performance. They make a high quality coil-over and their engineers on staff are top notch. I work with Jake Neuman ([email protected]) constantly and he is a great asset for projects like this. Reach out to him for sure.