Over the years there have been a number of landmark production engines that have found favor with hot rodders—the Flathead Ford, Chrysler Hemi, and the small-block Chevy just to name a few. But there are some new engines on the scene that are well on their way to being added to the list, namely the LS series from General Motors. These engines make great power, are economical, reliable, and they have been around long enough to be readily available in used or in new crate motor form. If there are any drawbacks to swapping an LS into an early truck it’s often the depth of the pan and the location of the engine-driven accessories. But never fear, there are solutions for both these problems and they come from one of the oldest names in the aftermarket business, Holley.
LS Retro-Fit Oil Pan
Holley’s replacement oil pan (part number 302-100) is shallower than the stock pan, providing considerably more chassis and ground clearance. The new cast aluminum pan has the structural rigidity of the OEM pan and holds 5.5 quarts (6 with the filter). It has all the features GM incorporated into the original design including the oil filter mount, oil cooler port, NVH suppression, bellhousing attachments, and it accepts the flange-style gasket. The installation kit includes a sump baffle, pickup tube, sump plug, oil filter stud, and oil passage cover.
LS Accessory Brackets
Packaging of the beltdriven accessories on the front of an LS engine isn’t always compatible with the dimensions of an early truck’s engine compartment, but again it’s Holley to the rescue.
Holley’s new accessory brackets have the appearance and stability of factory components and provide proper belt alignment. It should be noted that there are differences in the various LS engines, but Holley has that covered as well. Holley has a comprehensive “Fitment and Required Components Guide” to make sure all the components are compatible and even gives sources for additional parts such as the A/C compressor and alternator.
To determine which Holley kit is correct requires three simple steps. First is determining the belt alignment based on the engine’s crank pulley position. Next is to decide on the Holley accessory drive brackets required—A/C, alt, and P/S. Finally, choose the Holley installation kit for the accessories that will be used and the crankshaft pulley position.
Holley’s LS brackets are die-castings and come in natural finish, but can be painted, plated, or powdercoated. The A/C bracket mounts the compressor (either a GM R4 or Sanden) and the alternator (GM or Holley) at rocker cover level for increased chassis component clearance while still staying well clear of the hood.
Recently we took delivery of new LS from Chevrolet Performance that was destined for installation in a C10 pickup. Once it was uncrated in the Source Interlink Media Tech Center our very own Jason Scudellari went about swapping parts. Thanks to the reduced depth of Holley’s replacement pan and the brackets that relocate the beltdriven accessories our new LS was now a lot more old-truck friendly. Here’s how it was done.