i have 87 buick with a 307 carb (motor blown) and i have a 80 chevy malibu v6 not sure of the engine size yet but i i want to know if the malibu v6 will fit and how hard it will be and what would i have to do with the drive train have both trannies really dont want to buy a new motor and wiring do i need to change some stuff thanx joe