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Rollin Thunder - Ford Windsor Small Block 4.9L-5.0L/289-302 Cubic Inch; Hydraulic Roller; 1500-6500 RPM Range; 227 Degree Intake/ 234 Degree Exhaust Duration @ 0.050 Inch Lift; 0.520 Inch Intake/ 0.520 Inch Exhaust Valve Lift; 112 Degree Lo

Rollin Thunder - Ford Windsor Small Block 5.8L/351 Cubic Inch; Hydraulic Roller; 1500-6500 RPM Range; 235 Degree Intake/ 238 Degree Exhaust Duration @ 0.050 Inch Lift; 0.573 Inch Intake/ 0.582 Inch Exhaust Valve Lift; 112 Degree Lobe Separa

Rollin Thunder - Ford Windsor Small Block 5.0L/302 Cubic Inch; Hydraulic Roller; 1500-6500 RPM Range; 220 Degree Intake/ 220 Degree Exhaust Duration @ 0.050 Inch Lift; 0.498 Inch Intake/ 0.498 Inch Exhaust Valve Lift; 110 Degree Lobe Separa