All cobras are 5-speeds. Go with the 3.73s. Especially if it's your daily driver and you want to keep some descent gas mileage. 4.10s if it sees alot of track work and you don't mind sucky mpg's. The 3.73s would be the perfect one's actually. Also to tell what you have in your 8.8" look at the back side of the differential. There will be a metal tag on it. I believe it's the second line on the tag that will tell you your gear ratio. It'll say something like 3L27 if you have the 3.27s. The L stands for the positrac. 3L08 or 2L73, or if no posi then like 3 27, 3 08 or 2 73. 3.55s would be pretty good too but with your DOHC I'd recommend the 3.73s. Good luck.
