Stewart Stage One Water Pump The housing diameter is only

The housing diameter is only 2-5/8" and the splines are 3/4" x 36 spline

This is an easy way to attach a chain on a stock Chevelle lower

and tighten

15" Louvered Wheel Cover

Billet dust caps made just a bit thicker so they last longer

Stewart Stage One Water Pump The housing diameter is onlyChevy Short Style 5 8" Dia. Impeller Shaft Dual Fan Bolt Pattern Cast Iron The Stage 1 (Cast Iron) Water Pumps for Small Block Chevrolets use new original equipment castings, but are machined and assembled by Stewart Components to exacting standards. Compatible with stock lines and brackets, precision ground dual pattern fan hub for perfect pulley alignment.