I have a Turbocharged 94 camaro z28 m6. Currently pushing 400rwhp with 4:10 gears- stock 10 bolt. Next summer I'm upgrading to a 12 bolt rearend so I can run some slicks. I plan to push anywhere from 500-600rwhp on my forged engine in the future. What would be a good gear ratio for this set-up. It's mostly for the street. I was thinking maybee a 355 or 342?? - Or should I go with a 373?

 

3.42s, lets you use the boost longer in every gear.

 

Thanks. I think I will go with a 342. thanks again