Go with the 4.30's, I bought my car with the 3.73's already installed and from talking to people on this board and people around town the best all around gear is the 4.30's. The 3.73's just don't cut it in the Cobra's. JMTC
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98Cobra-3.73,Offroad
Xpipe,Flowmasters,Mac Cold air,SteedaTiming Adjuster16deg,Autometer Shiftlight,NittoDragRadials,Star Stage 2 Clutch,
60ft-2.013 1/8-8.488 mph-85.170 1/4-13.123 mph-106.148