Ford Big Block 429-460 1968-1995 Adv Duration: 281/289 Duration @ .050": 227/235 Lift: .554/.562 1800-5200, Rattler, choppy idle, high performance street, stock converter okay, best with 1800+ or gears
Ford Big Block 429-460 1968-1995 Adv Duration: 289/297 Duration @ .050": 235/243 Lift: .562/.554 2000-5400, Big Mama Rattler, lopey idle, street or street/strip, needs 9.0:1 compression, 2500+ stall
Ford Big Block 429-460 1968-1995 Adv Duration: 297/305 Duration @ .050": 243/251 Lift: .554/.571 2400-5600, Big Daddy Rattler, rough idle, pro street or street/strip, needs 9.5:1 compression, 2800+