Go with long tubes.I went with MAC 1 5/8 long tubes on 2 cars now,85GT and my present 87GT.I like them,installation takes time,but with patience you can get the job done.
The thing I would change however would be,getting BBK long tube headers,as their quality is alot better than MAC's is.Far as overall exhaust size,move up to at least 2 1/2 inch,as this will allow the forced air
to exit alot faster..
Control arms...hmmm there are so many to choose from these days. HP megabite control arms are a good choice.Alotta people use soutside Machine traction bars,but
personally I don't like them as they are noisy and use a solid bushing which tends to tear out torque boxes with ease,so I'd go with a control arm that uses a polyurathene bushing such as the HP megabite control arms use for example.
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Paxton Blown 87GT
ICQ#112698436