650s 2g MAS and old skool 5 knob problems

[Andrew7dg]

I am running a 2g MAS, 650s, and a 5 knob safc to correct it out a little in a 1g

First will this combo work? I turned down the fuel pressure a little but even though the 5 knob is a little crude, figured it would work.

However I am running RICH. It will start right up but after that the AFR just peg to 9.6. I am getting a check engine light that turns on and I am wondering if I am having a MAS problem. Do they go bad? Are all 2g MAS the same? Maybe I didn't get one from a turbo car...