I'm getting ready to file fit the rings on my 440 street motor for my sig car and wanted some input on the ring end gap. Most of the tech articles I've read seem to want .004" per inch of bore for the top ring and .003" per inch of bore on the second ring. With a finished bore of 4.350 this works out to .018" for the top (rounded up from .0174) and .013 for the second. The pistons are forged Diamond units made from 4032 aluminum which has 15% silicone added to reduce expansion by 15% . The piston to bore clearance is .0045 as per Diamonds recommendation. The motor will be street driven with NO power adders and a max rpm of around 6,000. Any input would be appreciated. Thanks.