Yeah the gc8 mate, i used the lift at work so that might of made the job a bit easier,if your doing it from above then the battery and washer bottle would probs have to come out for access, i used a spark plug socket and a really short extension so that when attached they were basically flush with the rocker cover then managed to get my ratchet on, then a few turns and they were finger tight, removed the ratchet and unscrewed them with the socket and extension then opposite way to put them back in, bit they are a pita sometime you just have to stand back with a brew, swear a few times then try again π, you'll get there it is possible haha