Spend a little time with Brian74 and look over his Goblin, you will get a better understanding of what is involved with a build. It is much harder to explain in words on the forum than to see it in person. I had much the same questions and being able to look at and ride in a TC Goblin (thanks RichRich) made all the difference in the world.
Just a quick response to some of your questions (this is all factory equipment, aftermarket parts may vary):
A 'base' Goblin (EFE or LS or LT with 2.2) will have the FE1 suspension - steel control arms, soft springs, small swaybars, small ball joints, thinner axles.
A 'sport' Goblin (SPORT/SS with 2.4, early SS with 2.0 SC) will have the FE3 suspension - aluminum control arms, stiffer springs, larger swaybars, small ball joints, medium axles.
A 'turbo' Goblin (late SS with 2.0 TC) will have the FE5 suspension - aluminum control arms, stiffer springs, larger swaybars, large ball joints, large axles.
The EFE, LS, LT, SPORT/SS and 2.0 SC cars will have an ECM that looks like this:
with 3 plugs.
The 2.0 TC cars will have an ECM that looks like this:
with 2 plugs.