I'll go with Stazi on the SAFC setup, however on the SVT computer, now you are running into a similar problem you had before. The computer is set for 19#'s with the MAF still reading for 16's and the two aren't communicating. The best solution is to get the MAF rebunerd to your current setup and then tweak slightly with the S-AFC. FYI when running my 42's for the first time even with the AFC set as far as it would go to pull fuel, I fouled out plugs in less than 5 minutes.
Rick
