AMG did 5.4/5.6/6.0L M117 with 16 and and 32V heads. The motors are awfully hard to find though.

What about an M119 swap? That gets you a 32V 5.0 motor that I believe is similar in size to a M117 with DOHC heads because that is effectively what it is.

Also, M120 V12s have been done in W124s... something to think about.

__________________
68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500

Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i