Rear jamo. The 4g15 is based on a g63. Whereas the 93 is different.
But i have no idea if cranks etc swap over.
The g15(p) runs the dual water pump pulleys like a 63 also. I think it runs no balance shafts.
The g15 siemens motors also have a crank trigger and chopper wheel mounted on the balancer. But the mounts are cast into the front cover and no idea if the cover changes over.
This is only from memory, been a long time since i had a g15 on the floor
