[sideshow]

start at the front left coolant temp sensor and cam sensor
and work your way back

if its a left hand drive loom then ecu might go thru firewall on drivers side

the gmmp looms have slightly longer branches to accommodate many motors
so thats y it might look daunting

another thing u can do is plug in the 2 white coils plugs
and start plugging the rest in
if something doesnt fit then flip loom over and swap coil plugs and start again

if u get really stuck goto your locakl holden dealer and take a new l98 comm for a test drive
then take it home and pop the bonnet and compare
then take it back heheheeheh