The Mittler Bros. Outer Lineup Blocks (14-Bolt GM / 07-20 Chevy Truck / Small Ford) are precision-machined round tube alignment rings used in rear-end narrowing applications. Designed for 14-Bolt GM, 07-20 Chevy Truck & Small Ford housing ends, these outer blocks slip over the jig shaft and seat against the outside of the trimmed rear-end housing to ensure accurate, square, and true reinstallation of the housing ends.
Sold as a pair, these 2.834″ outer blocks cover the 14-bolt GM, 2007-2020 Chevy truck, and small Ford housing applications — available here separately for builders assembling a custom narrowing setup for these popular housings. Made in the USA.
