Its an FBO engine. Heads are O's 1970 only. Stainless valves, steel guides, hardened seats. Lightly ported and polished C chambers. Crane ductile iron adjustables, 1.5/1.6. Smith Bros push rods. Racer Brown SSH 44 Hyd cam. 242@50 547 lift I believe. Zero deck forged Diamond pistons, 9.5. 560...