Chevy SBC 350 Vortec 180cc 64cc Straight Cast Iron Bare Cylinder Head these Speedmaster valve locks will

these Speedmaster valve locks will provide the reliability that you've been looking for

capable of withstanding valve spring load up to 600lbs

best of all

Speedmaster Twin-Carb combine two four-barrel carburetors to achieve the best balance of drivability

Chevy SBC 350 Vortec 180cc 64cc Straight Cast Iron Bare Cylinder Head these Speedmaster valve locks willAll Speedmaster 23deg. Small Block Chevy heads are available with Straight or Angled sparkplugs. Standard valve sizes are 2. 020 in. Intake, and 1. 600 in. Exhaust, both +. 100 in. length. While the 2. 02" valves are standard issue, all of our 23deg. aluminum heads can accept a 2. 050 in. intake valve with minimal additional work.