the plugs were fouled because they had the firing order wrong and they just kept turning it over trying to get it started. I allready had it running -it runs and idles smooth-- it has a knocking sound coming from under the valve pan cover and I'm taking off the covers to see where the noise is coming from. I was just wondering if there are any specific procedures I need to go through (ie. ford designed something stupid and you have to remove this part first-then this part second) or will it be just a standard r&r?