Thermo Control Kit - Chev Small Block Timing Case Drive (R) propeller inboard 3/4 refers to the thread

3/4 refers to the thread size on both inlet and outlet

This helps deflect the exhaust gases from hitting the outer log wall like some other design exhaust manifolds

Ford Cleveland Manifolds - Water Cooled Aluminium

suit GM engines V-6 & V-8 with stamped steel timing covers

Aluminium Carby Wedge to suit Soft Clutch & Velvet Drive Set ups

Thermo Control Kit - Chev Small Block Timing Case Drive (R) propeller inboard 3/4 refers to the threadThermo Control Unit to suit small block chev that is timing case driven ie: Dog Clutch. Mounted where your thermo blank off plate currently locates. Inlcudes Gaskets, bolts and washers and instructions. 1 2" BSP threads this kit also needs : Thermo Control Tees plumbing fittings x2 ( sold separately)