Oldsmobile 39 Deg V8 400-455 1967-1990
Adv Duration: 218/289
Duration @ .050": 227/235
Lift: .501/.501
Lifters Included: Yes, 91111
1800-5200, Rattler, choppy idle, high performance street, stock converter okay, best with 1800+ and gears.

Oldsmobile 39 Deg V8 400-455 1967-1990
Adv Duration: 289/297
Duration @ .050": 235/243
Lift: .501/.480
Lifters Included: Yes, 91111
2000-5400, Big Mama Rattler, lopey idle, street or street/strip, needs 9.0:1 compresstion 2500+ stall.

Oldsmobile 39 Deg V8 400-455 1967-1990
Adv Duration: 297/305
Duration @ .050": 243/251
Lift: .512/5.28
Included Lifters: 91411 Hyd. Flat Tappet
2400-5600, Big Daddy Rattler, rough idle, pro street or street/strip, needs 9.5:1 compression, 2800+

Oldsmobile 39 Deg V8 400-455 1967-1990
Adv Duration: 280/288
Duration @ .050": 235/243
Lift: .560/.565
Included Lifters: 91464 Hyd. Roller
1800-5200, Rattler, choppy idle, high performance street, stock converter okay, best with 1800+ and gears

Oldsmobile 39 Deg V8 400-455 1967-1990
Adv Duration: 288/296
Duration @ .050": 235/243
Lift: .565/.565
Included lifters: 91464 Hyd. Roller
2000-5400, Big Mama Rattler, lopey idle, street or street/strip, needs 9.0:1 compression, 2500+ stall