Goopool LS Swap Motor Mounts for 1973–1998 Square Body/OBS Trucks — Adjustable Cold‑Rolled Steel

Goopool LS Swap Motor Mounts are adjustable steel brackets engineered to install LS and Vortec engines into 1973–1998 Square Body and OBS Chevy/GMC trucks.

These conversion mounts let builders replace original small-block V8s with modern LS-series or Vortec truck engines while retaining common transmissions and factory-style engine placement. Manufactured from high-carbon cold-rolled steel with slotted adjustment, the kit supports both 2WD and 4WD full-size C/K trucks, Suburbans, Blazers, and SUVs across multiple model years.

Which engines and transmissions will these mounts accept?

The brackets are compatible with virtually all Chevrolet LS engines and many Vortec truck V8s. They accommodate standard bellhousing patterns and are designed to work with a wide range of automatic transmissions commonly used in swaps.

• Fits LS series: LS1, LS2, LS3, LS6, LS7, LS9 and GM 4.8L–6.2L (1997–2014)
• Supports 1999–2013 Vortec truck engines: 4.8L, 5.3L, 6.0L, 6.2L
• Transmissions: 4L60E, 4L65E, TH350, TH400, TH700R4, 4L80 and similar
• Mount pattern: LS/Vortec bellhousing compatibility retained

Will these mounts fit my truck—Square Body or OBS?

The kit was developed specifically for classic Chevrolet/GMC full-size platforms produced from 1973 through 1998. Mount geometry matches the factory frame and clamshell-style mounting points used on many original small-block installations.

• 1973–1987 Square Body C/K trucks, Suburban, K5 Blazer, Silverado, C10/C20/C30
• 1988–1998 OBS C/K trucks and SUVs including Suburban, Tahoe, Blazer, C1500–C3500
• Supports vehicles that originally used clamshell-style mounts (305, 350, 400, 5.0L, 5.7L)
• Works for both 2WD and 4WD chassis with common frame mounts

How do the mounts adjust and help with installation challenges?

Each bracket includes slotted holes to fine-tune engine position forward, back, or laterally for clearance and drivetrain alignment. The adjustability simplifies clearance checks for steering, exhaust, and accessory drives during mock-up and final installation.

• Slotted adjustment for precise engine placement in the engine bay
• Allows use of many standard automatic transmissions without custom bellhousing work
• Cold-rolled steel construction for rigidity during torque and load cycles
• Pre-drilled and sized for easier bolt-up to common LS/Vortec accessory patterns

What materials and durability features should I expect?

These motor mounts are made from high-carbon cold-rolled steel for consistent thickness and strength, with accurate accessory sizing to reduce fitment surprises. The design focuses on stability and repeatable installation for both home builders and professional shops.

• High-carbon cold-rolled steel for improved stiffness and wear resistance
• Accurate hole patterns and dimensions to match factory and aftermarket components
• Built to withstand typical swap loads and drivetrain forces
• Customer support and replacement options available for manufacturing issues

Who is this for: These Goopool LS Swap Motor Mounts are intended for classic Chevy and GMC truck owners, restorers, and custom builders who want to modernize powertrains with LS-series or Vortec engines while keeping common transmissions and factory mounting locations. They’re best for hands-on mechanics and shops performing engine conversions on Square Body and OBS-era C/K trucks, Suburbans, Blazers, and full-size SUVs seeking a durable, adjustable bracket solution.