2 600's? are you a glutton of punishment?
I see you now have to of the 12cyl beasts. I have a 94 sl-600, and am trying to sort out failed wiring harnesses to the throttle atuators and the main CAN wiring. Insulation turned to dust.
water pump just started to leak the other day and have new one, but not eager to disassemble the beast to replace it.
I LOVE it when it runs. Saw on a site the other day ignition trigger $6500!!. Checked it out and that was correct!!