mullinax95 said 390157 Bracket racing. Rough idle. 3000 stall. 4.11-4.56 axle ratio. Up o 850 CFM Carb. 10.5:1 compr. RPM-Range (3500-7000) Valve Lift (.507 .507) Valve Lash hot (.028 .028) ADV Duration (300 300) .050 Duration (254 254) LC 108 Click to expand...