Ford 9 in. 31 Spline Spool Nodular Iron Third Member Assembly Ratio:3.00:1 Small Block Chevy heads are

Small Block Chevy heads are available with Straight or Angled sparkplugs

Speedmaster shifters designed to fit most 3 or 4-speed automatic transmissions

which is much stronger than stock steel and mates better with an aluminum case

efficiency

Designed to look standard under your bonnet

Ford 9 in. 31 Spline Spool Nodular Iron Third Member Assembly Ratio:3.00:1 Small Block Chevy heads areSpeedmaster Ford 9 in. third member assemblies are designed to help you get that horsepower to the ground. They include high quality nodular iron thru bolt design center section, as well as a forged chromoly steel spool, 1350 series yoke, daytona pinion support, and gear ratio. Whether you're assembling a daily driver, street rod, or race car, Speedamster's third member assemblies will provide the durability that your vehicle deserves.