my opinion.. short shifters are a waste of money because you shorten the throw increasing the likelyhood of you missing a gear and in turn overrevving the engine deep into the redline, but yes the supra's throw is very long. exhaust manifolds try
www.pacesetterexhaust.com thats the only website I've found with exhaust manifolds for the 7M. Cold air intakes, since we have the mass air flow sensor, its hard to use a direct bolt-on intake like you can with hondas and other engines.. I just use a HKS mushroom style filter, it works decent and fits nicely in that cramped space, and spark plug wires.. why custom fab some accel 8 cylinder wires when you can buy a decent set of wires designed to fit the engine from toyota, napa, msd, etc for a fair price.
__________________
1987 Toyota Supra 7M-GE Natrually Aspirated Automatic
http://www.cardomain.com/ride/2385905
Currently enrolled in UTI (Universal Technical Institute.. ya ya say what you want bout the school lol its got some nice benefits though), have about two years of auto experience so far.. only 18 years old. My supra's older than me :P
-Phil