Oil Filter Relocation for Slant 6

and if you had a Australian V8 you would not be wishing for that set-up.... the remote filter head is mounted to the top of the motor.
changing the filter empties anything not held back by the anti return flap all over your engine..
again these get swapped on cars that don't care about originality, to something similar to above

their engine block, oil filter adapter however is a nice piece, just the rest of the implementation that lets it down..

exhaust, filter, and steering box on RHD, all need the same space, and there isn't much because the Australian tunnel and floor pan is a copy of the USA 60s auto trans floor pan, and is still offset to your passenger side of the car to match the short axle side of the diff... No space up front so you can see why they did it.
not like they could spin the motor the other way and mirror image the axle and transmission for a RHD implementation....
would have cost too much :)

Dave