ok....so i had been driving my car. i had noticed it had been running a little rough so i figured it was just the sprak plug fowling out do to the new climate....moved from michigan to wyoming. well on my way to go get spark plugs a day later, i started up the car and started to leave my apartment. all the sudden it started to make a clattering noise and i lost vaccuum cuz the brake pedal got really hard. i did a quick check of my guages and the oil pressure was still good and my coolant hadnt done really anything yet. i pulled back in and started disassembling the car. i pulled the intake and the valve covers...everything is normal. no broken rockers. now i pulled my plugs. all the plugs except for the #8 plug were a little whiter than usual and the #8 was covered in oil and what looked to be either fuel or water...couldnt tell. my nose was cloged so i couldnt smell. so im thinking either of two things happened. i either holed a piston or i blew a head gasket. i just got done pulling the heads 1g before this happened. the gaskets looked fine so i reused them... any help on a trouble shoot would be great