ROCKER ARMS This item is for sixteen (16) 1.5 ratio rocker arm kits (use with 3/8" studs) for 1955-1986 Chevrolet small block V-8 engines without self-aligning rocker arms. P/N (16) RK-501. Buyer will receive (16) rocker arms, (16) rocker nuts, and (16) grooved rocker fulcrums. We recommend the use of grooved fulcrums for any performance or high lift application. The grooved fulcrums provide better lubrication in the rocker arm pocket. FALCON TECH NOTE : Never install new rockers dry. They must be lubricated during initial start-up with the proper lubricant to avoid permanent damage. A generous amount of lubricant on each rocker arm, pivot ball, bushing pushrod tip, and valve tip can prevent damage to new parts. ROCKER ARM SPECIFICATIONS Ratio: 1.5 (stock) Stud Size: 3/8 in.; rocker studs not included Rocker Style: Stamped steel Fulcrum Style: Grooved FITMENT INCLUDES THE BELOW CHEVROLET ENGINES 1975-1976 262ci 1955-1957 265ci 1979-1982 267ci 1957-1967 283ci 1967-1969 302ci 1976-1986 305ci 1987-1988 305ci; without self-aligning rockers 1968-1973 307ci 1962-1969 327ci 1967-1986 350ci 1987-1988 350ci; without self-aligning rockers 1970-1980 400ci APPLICATION NOTE: This rocker is the non self-aligning style used on 1955-1986 Chevrolet small block engines and with some 1987-1988 305 and 350 engines. In 1987 and 1988, Chevrolet started using a self-aligning style of rocker on some engines. Before ordering, confirm these are the correct rockers for your application. We offer some of the quickest delivery times to most of the US on eBay. We have locations in Alabama, Louisiana, and Tennessee. These locations allow us to offer our customers quick, efficient service and delivery times. The free shipping option is available for orders shipped within the lower 48 US-states. Falcon Performance specializes in shipments to Sweden, Germany, Australia, Norway, Denmark, France, United Kingdom, Iceland, South Africa, New Zealand, Japan, Canada, and many other countries. Please use the shipping calculator for orders outside the continental USA. We do combine shipping costs for purchasing multiple items. Before paying, add all desired items to your eBay cart and then pay for all at one time. The eBay system will calculate the combined shipping discount. Please note that "free shipping" is not free for us but only to you. We pay to ship all parts to customers. Should you decide to return your purchase due to 'buyers remorse', we will refund the parts price less a restocking fee for the return; to mostly recoup our original shipping costs. Any damage to box or parts will alter the amount of the restocking fee. In many cases, we must buy new boxes from our suppliers. Put our 75+ combined years of experience to work for you... Thank you, the Falcon Team!