98 Cobra Rear Differential Help....

[desant89]

I bought a 98 Cobra, and did not know if it had gears. I just did a test by turning the wheel 1 rev, and counting the driveshaft turns. The driveshaft turned just under 3 3/4 times. I guess it has 373's in it. Can anyone tell me how accurate this test is? Also, where can I get the gear for the trans to sync up my Speedo? I do not want the electronic Speedcal as I will never change them again. Thanks!