I know from all the vast number of mustang lovers out there someone can help me out. I currently have a 1968 fastback with a 302, C4 transmission. I am getting ready to install a 1968 390 "S " code Big block into the car. Can someone tell me ALL of the specifics that I will need to change in order to do this ?? (e.g. -- Radiator ,? need a c6 transmission, new front springs ???, motor mounts, will ac still fit on this engine from the 302 ?? any "kits" available. ANY HELP WILL BE GREATLY APPRECIATED