Where are you Bob. What is your name BOB. It starts with a B Bob and ends in a B Bob. Sorry that's a line from a Cheech and Chong movie I once saw.
I have had a look at the E15 head as that was my original idea. The bolt holes line up but the water jacket and oil galleries are not even close, any idea how they do it.
The front of the motors look the same. If the alloy housing is removed it looks like the E15 water pump would mount straight in the same place but straight to the steel block not the
alloy case. My guess is that you wouldn't need t seal the front of the crank but maybe use the E15 front seal anyway. You would have to block the oil feed hole for the timing chain.
The E15 still runs a pulley in what would be the A series cam position as they still have a dummy camshaft that is there just to run the fuel pump.
As I say it all looks so similar but I didn't measure exactly as I thought it was a lost cause with the mismatch in the head.