modded

I beg your forgiveness for starting another 660 build thread. I bought this box of parts during the members sale since it was so discounted. I really don't need another saw, Already have a couple 361s I am using to test various modification on. But you know how it is, CAD strikes where it will...

How does M-tronic's affect porting/modding, AND How does porting/modding affect M-tronic's?? #1.) If the muffler is the only thing modded? #2.) If the only thing done was removing catheters? #3.) If the carb is the only thing modded? #4.) If the whole sha-Bang is ported?