29910 OMC Cobra upper gearcase, new GLM 21/16 ratio

Description

• Brand new, OMC Cobra upper unit gearcase. 21/16 gear ratio. For 5.7L Chevy V8, 5.8L Ford carbureted V8.
• Unit is 100% brand new and comes installed with u-joints and the output drive shaft.
• 21/19 gear ratio for use with 4.3 liter 6 cylinder engine upper gearcase units.
• 21/17 gear ratio for use with 5.0 liter V8 engine upper gearcase
• 21/18 gear ratio for use with 3.0 liter Chevy 4 cylinder engine years 1986 to 1989 and 5.0 liter Ford 302 V8 engines.