Ford SB 221-302 1963-1995, 351W 1969-1993 Adv. Duration:304/310 Duration @ .050":251/257 Lift:.592/.592 Lobe Separation:110 LC Includes Lifters:No 3000-7000. Small Base Circle, Upper mid-range & top end power. Needs 11.0:1+ CR.
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.
Ford SB 221-302 1963-1995, 351W 1969-1996 Adv. Duration: 306/312 Duration @ .050": 253/259 Lift: .640/.640 Lobe Separation: 112 LC Included Lifters: No 3200-7200. Small Base Circle, Best with big cubic inch. Needs 11.0:1+ CR, good heads.