My friends wanting to know if axles from a 94 civic ex Automatic would fit on his 91 civic DX hatchback. My only concern is the splines in the hub and differential being the same....will this axle swap work? Hes also planning on swapping in the 94 ex engine...hed be keeping his current 4spd transmission..what would he need other than the knock sensor wired to the ecu and the vtec solenoid wired to the ecu? what ecu should he run? thanks!