I am interested in upgrading my transmission from the original 2 speed to a 4 speed automatic with OD. I'm looking for better performance and lower RPM when on long highway runs. Your part #555-60306 states that it will handle up to 450hp, which is well above my 345hp. I want to know what adapters, if any, are need to bolt up directly to my original 1965 400CID Olds engine? I want to purchase everything needed at one time such as torque converter, adapters, linkage, cables, cable mounts and so on. I can handle any driveshaft modifications as long as I know what they are. I can also make any cross members mounting location changes. I would like to keep the original center console and shifter as long as the shift linkage can be modified to adapt. I know this is a lot of questions, but I want to know as much as possible prior to purchase and installation, with minimal minimal surprises. Thank you!!