Just bought a 91 and already have a 90 got a few questions

[Juiceit]

ok here it goes i already have a 90 with intake and full exhaust system (header all the way back) full ignition and 125 shot of nitrous ok now the 91 i just bought i want to know can i just take my entire exhaust system out of my 90 and put it in the 91? also i know the whole ignition will change over but also any suggestions on intake tubing and filter? also i keep hearing about these secondary butterflies inside the intake maniflod r these only in the sohc motor or r they only in the dohc motor or r they in both??

[Juiceit]

also....i have an act clutch in the 90 can i just switch it to the 91????

[240doc]

are you swapping parts from 12-valve to 16-valve? (90 model should have 12-valve engine) if so, I think the clutch is different. I looked up a centerforce clutch for my 91 and the part numbers are different from the 89-90 12-valve engine. --anyone else?

[Juiceit]

what im gonna do is try to take as many performance parts out of the 90 and put it in the 91 and then my 90 is getting my 383 stroker that i have sitting in my garage:) but what im trying to get at is what parts r interchangable so my 91 will be as good as possible