When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Same stock valve hand ported 317's off the old engine. Comp valvejob to factory angles, less than .00015'' runout on seats, and valves. I had to replace, and report one head. Also polished chambers this time @73cc's.