HOW TO FIX LOW COMPRESSION. DIY RIDGE REAMER. THE OTHER GUYS PONTIAC TROPHY 4 CYLINDER. I BOUGHT A 1961 PONTIAC TROPHY 4 CYLINDER-IT DOESN’T RUN! CAN I FIX IT FOR THE DYNO? WHAT HAPPENS WEHN YOU HAVE NO COMPRESSION? TIME TO TAKE OUT THE BALL HONE AND VALVE GRINDING COMPOUND! WHAT ABOUT THE RIDGE AT […]