what kind of v8 are you putting in right now in mass they arent doing the dyno i dont think the just plug into your cars data port and if you have a code you fail but its not a legal swap in mass our emmisions laws are almost as strict as california
pack's right. if there's any codes, it'll fail emissions. Also, the trucks motor is stored in the RMV's vehicle information database. If you plug it in and the computer's showing a couple more cylinders, i m sure that wont fly either.
your better off doing a swap in a '95 or older truck. then you can fudge the dyno test...or atleast i can:evilg: