Ga16DE.. motor swap

ok so..my freind decided to swap his ga from a 1998 nissan 200sx that has 205k on it cause it won't start.. we have no clue whats wrong wit it.. he found a motor with 100k on it for 200 bucks..look cleans.. and was very well kept. the motor matches mine in my 1995 200sx..but the engine he wants to swap it with has a few things ive never seen...it has a boost sensor on the fire wall as well as vacuum lines attached on top of the intake manifold.. the new engine he got does not have any of this...would we have to swap intake manifolds? or can we bypass all that stuff.. wait. basically my question comes down to this.. can you swap in a 1995 ga into a 1998...if we can.. what has to be salvaged...my other concern is the ecu.. will the 98 ecu work with the 95 motor?