Here are the heads, they weigh about 100+ lbs. each and are really interesting. The injectors are run on oil pressure + an electronic pulse, the heads have huge oil galleys that feed the injectors from an auxiliary high-pressure oil pump (HPOP) on the top of the engine. The heads wound up needing a complete valve job w/ all new intake valves.
Here is the front of the engine w/ cover off, it has a gear-driven cam w/ roller lifters and the HPOP gears to the top of the cam gear. (Not installed yet in this photo):
Here is a detail of the HPOP, (w/ 2 lines attached, 1 for each bank of cylinders), and its reservoir, the tall box:
