afc neo tuning please please help

[Timeless513]

so i have a safc neo in my 89 240sx i am currently running a z32 maf and 550cc injectors on a stock ecu and i need to figure out the in and out to put into the afc for the z32 maf i have heard quite a few things some say 2 in 2 out and others say 2 in 6 out but and do i do twin in and out or single in and out also when i put in single 2iin 6 out it revd really high and ran at a really high idle any ideas any input will help i will also be doing more research on this and other forums but any details will help maybe someone who is runn the same setup