Ford SB 221-302 1963-1995, 351W 1969-1993 Adv. Duration:304/310 Duration @ .050":251/257 Lift:.592/.592 Lobe Separation:112 LC Includes Lifters:No 3000-7000. Small Base Circle, Upper mid-range & top end power. Needs 11.0:1+ CR.
Lobe Separation: 110 LC Includes Lifters: No 2200-6400. Small Base Circle, Rough idle, hot street/strip, excellent mid range performance. 2500+ stall, gear, intake.
Lobe Separation: 112 LC Includes Lifters: No 2200-6400. Small Base Circle, Rough idle, hot street/strip, excellent mid range performance. 2500+ stall, gear, intake.