Standard Base Circle

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - Stock Lift Rule - Heavy car, 1⁄4 mile track, low end
INT/EXH - Dur @ .050” Lift: 218°/224° RR: 1.5/1.5 Gross Lift: .390”/.408” LSA: 108° RPM: 2750 to 6000 Redline: 6500 Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - Stock Lift Rule - 3⁄8 mile, high bank track, mid to top
INT/EXH - Dur @ .050” Lift: 238°/242° RR: 1.5/1.5 Gross Lift: .390”/.410” LSA: 106° RPM: 3250 to 6000 Redline: 6500 Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - Stock Lift Rule - Lighter car, 3⁄8 mile track, low end
INT/EXH - Dur @ .050” Lift: 228°/236° RR: 1.5/1.5 Gross Lift: .390”/.410” LSA: 106° RPM: 3000 to 6000 Redline: 6500 Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - Stock Lift Rule & Stock Vacuum Rule - Lighter car, 3⁄8 mile track, low end
INT/EXH - Dur @ .050” Lift: 238°/242° RR: 1.5/1.5 Gross Lift: .390”/.410” LSA: 116° RPM: 3250 to 6500 Redline: 6500 Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - Stock Lift Rule - Heavy car, 1⁄4 mile track, low end
INT/EXH - Dur @ .050” Lift: 218°/226° RR: 1.5/1.5 Gross Lift: .419”/.420” LSA: 108° RPM: 2750 to 6000 Redline: 6500 Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - Stock Lift Rule - Lighter car, 3⁄8 mile track, low end
INT/EXH - Dur @ .050” Lift: 228°/234° RR: 1.5/1.5 Gross Lift: .419”/.417” LSA: 106° RPM: 3000 to 6000 Redline: 6500 Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - Stock Lift Rule & Stock Vacuum Rule - 3⁄8 mile, high bank track, mid to top
INT/EXH - Dur @ .050” Lift: 234°/242° RR: 1.5/1.5 Gross Lift: .417”/.416” LSA: 114° RPM: 3250 to 6500 Redline: 6500 Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - Stock Lift Rule - Heavy car, 1⁄4 mile track, low end
INT/EXH - Dur @ .050” Lift: 220°/226° RR: 1.5/1.5 Gross Lift: .451”/.453” LSA: 108° RPM: 2750 to 5750 Redline: 6250 Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - Stock Lift Rule - 3⁄8 mile, high bank track, mid to top
INT/EXH - Dur @ .050” Lift: 234°/242° RR: 1.5/1.5 Gross Lift: .417”/.416” LSA: 106° RPM: 3250 to 6000 Redline: 6500 Learn More

Chevrolet - 262, 267, 283, 302, 305, 307, 327, 350 & 400
Performance level 5 - Stock Lift Rule - 3⁄8 mile, high bank track, mid to top
INT/EXH - Dur @ .050” Lift: 236°/242° RR: 1.5/1.5 Gross Lift: .449”/.446” LSA: 106° RPM: 2750 to 6250 Redline: 6500 Learn More