engine questions

[Nate Beck]

The question I have is what is the main difference between the MC-1 and the
MC-2 besides the comression ratio and the dual knock sensors instead of 1.
The reason that I ask is in my quest to replace the engine in my new 5k with
has the MC-1 I got the whole MC-2 for $500 to include the wiring harness,
computers, motor, intercooler, intake, exhaust, and so on.  It originally
was going to be the engine that went in my 85 coupegt. But now it is
destined for the 5k.  What if anything do I need to swap when I put in the
MC-2?   Thanks