I'm not the Rocketeer. �He is far more informed than I am on these things, but from what I have read and dealt with personally, the easiest way to tell if your frame is a 3A or a 2A is by looking at the position of the motor mount brackets welded to the frame. �The 3A mounts are offset. �The 2A mounts are directly in line with each other. �
The 3A offset the mounts and changed the front mounting plate on the engine, all to make room for the fuel pump with the wiper vacuum function.
It's kind of hard to see this offset by just looking, so: �
If the dog ear, driver side, on the front engine mount plate is pointing to the front of the jeep which is attached to the motor mount, and the motor mount is attached directly to the frame bracket �(no additional offset bracket or spacer) then you have a 3A frame.
Note: The dog ear on the engine front plate, passenger side, will always point to the rear of the Jeep. �
