Frame Extension Adapter Kit GM LS to GM A/G Body

The HOOKER Frame Extension Adapter Kit for GM LS to GM A/G Body is a purpose-built transmission crossmember mount solution engineered to adapt LS-series engine platforms into classic A-body and G-body General Motors frames. This frame extension adapter kit provides the structural foundation required when modernizing vintage 1978–1988 G-body vehicles with contemporary LS powerplants, eliminating costly custom fabrication and ensuring factory-level alignment and load distribution.

Manufactured from steel and finished in black powder coat, this adapter kit delivers durability and corrosion resistance across extended use. The extension design maintains proper driveline geometry when transitioning from original G-body transmission mounting points to LS engine specifications, a critical factor for drivetrain longevity and vibration control. The kit's compact footprint—8.3 x 6.5 x 8.9 inches—integrates directly into existing frame channels without requiring frame rail modification, preserving structural integrity while accommodating the dimensional differences between classic and modern GM powertrains.

This adapter appeals to restomod builders, classic car enthusiasts, and performance engine swap specialists undertaking LS conversion projects on pre-1989 A-body and G-body platforms. Whether upgrading a Chevrolet Malibu, Pontiac Grand Am, or similar vintage platform, this extension adapter eliminates guesswork in transmission mounting and ensures proper crossmember alignment—essential for safe highway operation and reliable engine bay geometry. The black powder-coated finish resists salt air and moisture common in outdoor storage or humid climates.