Ford SB 221-302 1963-1995,351W 1969-1993 Adv. Duration: 290/298 Duration @ .050": 237/245 Lift: .597/.597 Lobe Separation: 110 LC Includes Lifters: No 2500-6500. Small Base Circle, Lopey idle, Hot Street/Bracket, good mid-range. 9.5-10.5:1 CR, 2800+ stall.
Ford SB 221-302 1963-1995, 351W 1969-1996 Adv. Duration: 300/300 Duration @ .050": 247/247 Lift: .603/.603 Lobe Separation: 110 LC Included Lifters: No 2600-6600. Small Base Circle, Rough idle, Street/Strip, good mid range performance. 3200+ stall, good intake.