YOU,LL HAVE TO BORE THE BLOCK FOR SURE, ITS NORMAL FOR THIS FAMILY OF ENGINE. THE 2 FRONT HOLE RUNS ALOT HOTTER THAN THE REST SO THEY WARE THE MOST. I,VE SEEN ALOT OF NEVER TORN DOWN ENGINES THAT .060 WONT CLEAN UP. IT TOOK ME 3 292 BLOCKS TO GET 1 THAT .060 WOULD CLEAN IT UP...... EVEN THEN I HAVE TO SLEEVE #1 HOLE......... BETTER TEAR IT DOWN AND LET YOUR MACHINEIST MEASURE IT FIRST THING BEFORE YOU ORDER ANYTHING. AS FAR AS RAISING COMPRESSION ONLY 3 WAYS TO DO IT
1. LP PISTONS
2. CUT BLOCK/HEAD SURFACE
3. CLOSED CHAMBER 194 HEAD
292= BIG $$$$$$$
