Just fired up 383 ,Roller edddy heads etc ,Its got i beleive 2295 old school pistons ,I know these pistons had a slot in them for sparkplug ,never even thought about this when clayed for clearance ,had a miss ,found a plug with the electrode bent over ,i hope i dropped it and missed it ,but i,m thinking its kissed the piston ,didn,t see any marks on it ,but got me concerned with these angle plug heads ,any ideas here ,smaller plug ,don,t want to pull motor apart to grind clearance for plugs ,might have too ,thanks