Did a 261 with TBI in my 55 pickup. Took out the 327. Drove it for the first time today. What power, the 3.90 rear has to go. Did a T-5 with 3.50 first and .78 OD. Thinking about a 3.08 posi out of caprice police car that I have. Any body running a 3.08 and this transmission ratio ?