5m's never came turbo
so unless someone has swapped 7m parts on to the 5m you have a mk3 7mgte supra
it is odd that ur in ny and it's an 86 & turbo i guess someone could have swapped it at some stage
yup RA is finish/smoothness/perfection lol
the maf is not dual... everything works from the AFM, the car is not mapped in any way
more than likely if you do have a 5m that's been turbo'd you won't have fuel cut or any of that annoying stuff but you will have a serious lack of fueling
if it is a 5m i would suggest an aftermarket ecu to control it properly or the engine may just bite the dust
good luck