Valves
 

ok here is the deal, i broke the top of the valve steam, (around the groove for the retainer) how the heck did this happen??? luckely i did dot suck the valve into the cylender...
what caused this???

since i have to take the head off to get the rest of the sparkplug out of the cylender, i want to redo the heads new valves, hot tanked new seats ect ect i also want deck the heads to get a little higer comp, how much can i shave off the bottom with the cam i have (e-cam)

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PPG Torch Red 95GT, Ported Explorer Intake, E-303 cam, 75mm MAS, BBK Adj. fuel Reg & gauge, BBK Shorty Headers, BBK H-pipe, March Pulleys, 2 Chamber Flowmasters, Kenny Brown 6 point Roll cage, Kenny Brown Panhard Bar, Powerslot Rotors, Eibach Sportline Springs, 180* Thermostat, 1/2 Plenum Spacer, MSD 6AL, MSD Master Blaster, MSD 8.8 Wires, 19# Racing Injectors, AFS 10.5" Cobra R's, Nitto 555's, Eclipse & JL Stereo System... I just sold My K&N, It looks funny with Stock Air Box & filter!!!