The SRT6 diff ratio is 3.46, I've purchased the 3.69 ratio, I'll keep you posted.

PS: You'll love this one Dan, I'm still waiting for the SRT6 that I ordered to be delivered. But I have decided to take delivery and swap the super charger and intercooler with my car then give the SRT6 minus SC & IC to Jenny since she can't drive a man tran anyway.