I am building a 289 cu in engine for my 66 mustang. I purchased new pistons (Mahle) with file to fit rings. My problem is the oil expander ring is to long. When I put it in the cylinder to check the gap the only way it fits is for the ends to over lap. I checked the gap on all the other rings in all the cylinders but do I also need to gap the expander and is it OK to wack off about 1/8 inch. What gap should it be set at.
