The stroker kit has pregapped rings for this particular bore, but that doesn't mean we didn't check them with a feeler gauge. For an N/A engine, the top ring gap is 0.0045 per inch of bore diameter. For a mild nitrous engine, the gap should be 0.005 per inch on the top and intermediate compression rings. We measured the gap with the ring squared 1 inch down the bore. If the gaps are tight, Childs and Albert sells a ring machine to file-fit the rings.