I have a very good hook-up with Optima battery and wondering which one do I get? My battery is relocated in the trunk and is sealed off by an aluminum rear seat delete, so I am not exposed to the fuel cell and battery per NHRA rules. But, I don't don't know which one to get, as far as the model type. I do know I am going to get the yellow top, just because I get 50% of Optima batteries. There's model 51, 75/25, 31, 34, 35, 27F, 51R, 34/78....no idea which one to get? They range from 450 cranking amps to 900 cranking amps.