I do not have a set of 2486315 heads. I do have a pair of 1966-1967 273 closed chamber heads 2658920. They have 1.78/1.50 valves , 156 cc intake ports, 68 cc exhaust ports. They have a fresh valve job. I need $349 for the pair and shipping UPS. email me at
dyeterry@att.net for info details and a parts for sale list. Thanks Terry Dye