Pair of 540 c.i., 570 h.p. engines with less than 15 hrs. since rebuild in 2023 . Built and tuned by Steve "Smitty" Smith (ArticFriends" on OSO). Closed cooling. Eagle Cranks, Scat Rods. Mercury 500 EFI Plenum and intakes with TPIS Mono-blade Throttle bodies and 48lb. Holly injectors. New Holly fuel pumps. MEFI 3 Ignition. Gil Exhaust complete with SS dry to transom pipes. 3"X24" Oil Coolers. Build and Dyno sheets available. Include all pumps, pulleys, coolers etc. Drop in and run ready. $40,000 for the pair, firm. Will not split. Cass Tucker 540-797-3769