Best bet is to use a GM MAF-t in conjunction with DSMlink. It will give you virtually no restriction, even though you are still using a mas. Another option is MAF-T pro, which works like a new, advanced version of the VPC. It's able to control timing, injectors 60%+/-, datalog, tune to target A/F when used with a wideband. It is a pretty cool setup for the cost IMO.