Small Block Chevy Universal Motor Mount Kit - Heidts

The Small Block Chevy Universal Motor Mount Kit by Heidts is a heavy-duty, weld-in chassis solution engineered for hot rods, street rods, and custom classic truck engine swaps. When dropping a classic Small Block Chevy (SBC) V8 into a non-native or completely custom frame, factory bolt-on brackets rarely align. This universal kit bridges that gap, giving builders a rock-solid, adjustable foundation to dial in the perfect engine setback and crankshaft angle.

Heavy-Duty Component Breakdown

Heidts packages this universal kit with everything needed to permanently mount your engine to the vehicle chassis:

• Weld-In Frame Brackets (Gusseted Steel): The kit includes raw, heavy-gauge steel frame mounts. These are intentionally left long so they can be trimmed, notched, and contoured to match the exact width and boxing configuration of your specific frame rails before being welded into place.

• Polyurethane Inserts: Moving away from soft factory rubber that tears under high torque, or harsh solid metal mounts that transfer punishing vibrations into the cabin, Heidts utilizes premium polyurethane bushings. These deliver the best of both worlds: they completely isolate engine vibrations while remaining rigid enough to handle high-horsepower launches without flexing.

• Engine-Side Plates: Precision-stamped steel plates bolt directly to the standard three-bolt mounting pattern found on the sides of all classic Small Block Chevy engine blocks.

• Premium Grade Hardware: Includes all the necessary high-tensile strength through-bolts, nuts, and washers required to secure the engine plates to the frame brackets.

Fitment and Application Notes

• Engine Compatibility: Fits all standard vintage Small Block Chevy V8 platforms, including popular displacements like the 283, 305, 327, 350, and 400. (Note: This kit utilizes the traditional 3-bolt SBC pattern and will not directly fit modern Gen III/IV LS-based engines without adapter plates).

• Universal Application: Because the frame brackets are completely customizable, this kit is the standard choice for dropping an SBC into early Ford high-boys, classic Chevy 3100 or Ford F100 trucks, or custom independent front suspension (IFS) subframes.

Installation Best Practices

Because this is a universal weld-in kit, mockup is critical to a successful installation.

1. Assemble the mounts to the engine block first.

2. Lower the engine and transmission into the bay as a single unit to verify your firewall clearance, steering shaft tracking, exhaust manifold/header clearance, and oil pan-to-crossmember depth.

3. Once the engine is perfectly level and your driveshaft angle is calculated, tack-weld the frame brackets into position.

4. Remove the engine block before executing the final structural welds to protect the polyurethane bushings from melting under extreme heat.