my opinion is simple green, a soft brush and a slow rinse.... i wouldn't run the pressure washer in the engine compartment.... why push all that pressurized water where you don't want it? cover distributor, coil, relays and fuse box with plastic bags - i'm guessing you'll get most of the dirt out this way and not risk water damage to electrics and linkages...
Bob Happe
Pittsburgh, Pa
1970 280SL, white/black 4 speed
