[Capt Fiero]

Dang if you can run it like that it would be a simple matter of puting a check valve in the stock MAP sensor line so it never see's any boost in the intake and then run the MS system to add fuel via secondary injectors and a timing retard via an external MSD system. This would allow you to have a totally stock ECM and totally stock fuel system with just add on componints to be totally tunable and easily changed in modules rather than an entire system. The only draw back is that the right hand would not know what the left hand was doing so you would have to be the smart one in the middle to teach everthing to play nice.