[Michael C Henry]

What do the spark plugs look like? My piston stop bolt is manufactured and packaged by Comp Cams. It's all brass. 18mm x 1 theads, about 1/2 inch of threads, #4792 When my ignition was cutting out the plugs were all souty carbon fouled. I cleaned them in spark plug cleaner ( small sand blaster). I'm still using the same spark plugs today.