You could talk to ZZP and get them to modify a stock 97 throttle body so that you can use a stock MAF without an AFC and get upwards of 18-20psi.
Im running a ported 72mm 97 throttle body with a 99+ MAF and about 14-15psi without it being maxed (about 2000hz from being maxed)... although Im looking into my setup to make sure that my MAF and everything is reading correctly.
EDIT: Your setup looks pretty beefy. Either way, you could talk to Matt from ZZP and he can set you up with a good setup. Stock or whatever, hes been a big help for me.