LS Truck Alternator & Power Steering Brackets: Which of the 4 Actually Fits Your Swap?

What Accessory Bracket Is Right for My LS Swap?

Choosing the right accessory bracket for your LS swap isn't always as simple as picking the first one that fits. Steering box clearance, hood clearance, aftermarket fuel rails, valve covers, and even your belt routing can all affect which bracket works best for your build.

To make that decision easier, we created this comparison guide and video that show the differences between four of our most popular LS alternator and power steering brackets. Instead of digging through multiple product listings trying to spot small differences, you can compare them side-by-side and quickly determine which bracket is right for your swap.

The guide highlights:

- Alternator location differences
- Power steering pump position
- Steering box clearance
- Hood clearance
- Valve cover clearance
- Belt routing options
- OEM replacement vs. relocation brackets

551777: OEM Truck Replacement

If you're starting with a salvage yard truck engine and simply want a cleaner, stronger replacement for the factory cast bracket, the 551777 is the perfect place to start.

This bracket keeps everything in the factory location, including the stock belt length and accessory positions, making it an easy bolt-on replacement while giving your engine a much cleaner appearance.

The downside is that the factory power steering location can interfere with the steering gearbox on many older Chevy swaps.

View 551777 →

551747: Additional Steering Box Clearance

If your steering box interferes with the power steering pulley, the 551747 solves that problem.

This bracket keeps the alternator in the factory location while moving the power steering pump inward 1 inch, providing valuable steering box clearance on many classic Chevy swaps.

It also adds another advantage. We incorporated an additional idler pulley location that lets you change the factory truck belt routing. Instead of routing the belt over the water pump, you can relocate the idler underneath the alternator and run a much cleaner, more traditional belt path. This is especially helpful when using a car-style intake manifold where the factory routing can interfere.

View 551747 →

551519X-3: Fuel Rail & Hood Clearance

Sometimes the issue isn't just the steering box, it's also the alternator.

If you're using aftermarket fuel rails with a fitting coming out right behind the alternator, especially with a large 160-amp alternator, the alternator can interfere with the fuel fitting on the aftermarket rail.

The 551519X-3 moves the alternator 5.5 inches out and 2 inches lower, creating the additional room needed for fuel rail clearance while also improving hood clearance.

This bracket also retains the 1-inch power steering relocation, so you still gain the steering box clearance offered by the 551747.

View 551519X-3 →

551519XL-3: Maximum Valve Cover Clearance

For builders running oversized valve covers, especially versions with hidden ignition coils under covers, you may need even more room.

The 551519XL-3 moves the alternator 8 inches out and 2 inches lower, giving you the maximum clearance for large valve covers while still maintaining the 1-inch power steering relocation for steering box clearance.

View 551519XL-3 →

Which One Do You Need?

●        Stock brackets are ugly (or missing)? 551777.

●        Power Steering Pulley hits steering gear? 551747.

●        Want to run car intake, or aftermarket fuel rails on truck intake or need hood clearance? 551519X-3.

●        Tall valve covers clash with alternator? 551519XL-3. 

Compare Them Side-by-Side

Our comparison guide lets you instantly see how each bracket differs. Instead of reading through specifications one product at a time, you can compare alternator height, alternator offset, power steering location, steering box clearance, and valve cover clearance at a glance to determine which bracket best fits your combination.

Whether you're performing a simple truck engine swap or building a turbocharged street truck with aftermarket accessories, the guide takes the guesswork out of selecting the correct bracket.

Watch The Comparison Video

We've also created a video that walks through each bracket, explaining exactly why each version exists, what problems it solves, and when you should choose one over another. If you're still unsure which bracket fits your application, the video is a great place to start.

Still not sure which one fits? Call the fitment specialists at 316-800-6959, or browse the full lineup.