I'll have a look at cleaning them up, it was a couple of weeks ago and i've slept since so i can't remember how bad they are, i just know they wont sit flush with the top of the spark plugs.
Thanks, I'll get back to you
Good, i just didnt want to hear it was this or that that needed replacing at $$$
Yeah thats what i thought, probably from a scrapyard or something, but yeah they all test ok.
Cheers for everyone's help