ok so heres the background info... i have a sbc 305 standard bore, and slightly over sized cam. everything is brand new. i literally just put it together. runs like a champ. only probelm is the spark plug on the #7 cylindar keeps getting hit by the piston (i beleive) and i dont understand exactly why that is... i have Autolite 26 plugs. all the other plugs are fine and dont have a nick on them. its just that single cylindar is doing this... any sugestions as to why this is happening and/or any way to fix?

-Al