hey all; I know this is a late post but I have a 55 coronet with whats left of a 270 poly. the motor is mounted to the water pump housing and no provision for side mounts to the frame is there I will have to make mounts to put in my 88 318 and trans mount as well and finding steel mounts for the 318 is hard. plenty for 340s and 360s but not 318s. 318 mounting boss is wider on one side.340 and 360 are same on both sides.