Understanding Fourtrack engine emission control and diagnostic port ??

Forum: 

I have a 1998 fourtrack engine which i would like to install in to a 1989 leaf sprung
fourtrack, has any one out there done this as the new engine has a dianostic port
and the wireing at the pump is differernt it allso has a an electronic box with
Emission control written on it do i need this to run the engine and can you by pass
these extra parts to get the engine to run as the old engne does not have this
am allso wondering what you would plug into the dainostic port? can any one advise?
i see there is a black box on the back of the pump with two plugs on green one black??
and a black box on top off the throtle leaver on the pump?