IHOUMEX LS Swap Motor Mounts for 1973–1998 OBS Chevy/GMC C/K Trucks — Adjustable Fit for LS1–LS9 & Vortec 4.8–6.2L, 4L60E/TH350 Co

These IHOUMEX LS swap motor mounts are a purpose-built solution for swapping modern GM small-block powerplants into classic square-body trucks and full-size SUVs. Built from high-carbon cold-rolled steel and finished with a durable black powder coat, the mounts provide a rigid, corrosion-resistant platform while offering adjustable positioning to clear transmissions and driveline components. They accommodate a wide range of LS-series and Vortec truck engines and several common automatic transmissions, simplifying fitment and reducing fabrication time.

Which engines and trucks will these mounts work with?

The mounts are compatible with Chevrolet LS family engines (LS1–LS9) and many Vortec truck engines from the late 1990s to early 2010s. They fit 1988–1998 OBS full-size Chevy and GMC C/K series trucks and SUVs, including Silverado, Suburban, Tahoe, and full-size Blazer applications.

• LS engines: LS1, LS2, LS3, LS6, LS7, LS9 and LSX variants
• Vortec truck engines: GM 4.8L–6.2L families (LM7, LQ4, LQ9, L92, etc.)
• Vehicle fitment: 2WD and 4WD C/K series, 1500–3500, Suburban, Tahoe, Yukon, Sierra

How does the adjustable design help with transmission clearance?

These mounts include slotted brackets that allow fore and aft adjustment, enabling you to move the engine forward or back to clear bellhousings, crossmembers, and steering components. That flexibility supports a variety of automatic transmissions and helps you achieve proper driveline angles without extensive frame modification.

• Adjustment range: approximately 2" forward, 1/2" rearward
• Compatible transmissions: 4L60E, 4L65E, 4L80, TH350, TH400, TH700R4 and similar units
• Helps reduce need for custom crossmembers or excessive trimming

What are these mounts made from and how durable are they?

Manufactured from high-carbon cold-rolled steel, the brackets are engineered for strength and dimensional stability under load. A black powder-coat finish protects against rust and chips, extending service life in street, work, and light off-road conditions.

• Material: high-carbon cold-rolled steel for rigidity
• Finish: protective black powder coat to resist corrosion
• Built to withstand torque and vibration typical of LS/Vortec swaps

What hardware and fitment tips should I know before starting?

While these mounts provide the core attachment points, successful installation often requires matching motor plates, appropriate transmission mounts, exhaust clearance checks, and drivetrain alignment. Expect to evaluate engine height, steering link clearance, and possibly modify crossmember or starter location depending on your specific engine and trans combo.

• Confirm bellhousing pattern and starter clearance before final assembly
• Use transmission-specific crossmember or adjustable trans mount as needed
• Check driveshaft length and pinion angle after final positioning

Who this is for: These IHOUMEX LS swap motor mounts are intended for mechanics, restoration shops, and experienced DIYers performing LS or Vortec engine swaps into 1988–1998 OBS Chevy and GMC C/K trucks and full-size SUVs. If you need a strong, adjustable mounting solution that reduces custom fabrication and works with common GM automatic transmissions, these mounts provide a reliable foundation for your project. They are not a complete engine swap kit — verify engine/transmission compatibility, additional brackets, and drivetrain components before purchase.