As long as your planning on keeping the GT-40 upper I would say "YES" its worth it. it will give you a large increase in flow and will have a mirror like finish. We had my dads 93 Cobra's intakes done, turned out very nice.
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My Ride Check Out My Site 91GT, Holley SysteMAX II Kit-Heads 2.02" x 1.60",Full MAC exhaust 1-5/8" Long tubes, 2-1/2" O.R H-Pipe, 2 1/2" cat back, 12" K&N Filter, RNH PERFORMANCE Ram Air, Ron Davis Radiator, Full Suspension,3:73's, Welds, Best on new motor-12.60 @ 108, no traction 1.98