If you're revving up your classic Chevy or just looking to squeeze out a bit more from your engine, these ACL Race Series Engine Bearings are worth a serious look. They're not your run-of-the-mill bearings; these bad boys are designed for high-performance applications and can handle the heat and stress of higher RPMs without breaking a sweat.

What sets these bearings apart? For starters, they feature a high-strength overlay plate that's thinner than most, which helps with fatigue resistance. That means you can push your engine harder without worrying about the bearings giving up on you. Plus, all the rod bearings come with hardened steel backs. This adds extra support for the bearing lining and keeps everything snug in the housing, which is crucial when you're out on the track or cruising on the highway.

• The increased crush helps keep the bearings in place, so you won't have to deal with any annoying slippage.
• They've ditched the flash plating on the back, which improves heat transfer and enhances the grip between the bearings and their housing. This is key for maintaining performance, especially under pressure.
• With increased eccentricity, these bearings can handle bore distortion at high RPMs while helping to form those all-important hydrodynamic oil films.
• The 3/4 grooved main bearings optimize load-carrying surface area and ensure oil flows smoothly to the conrod bearings. This is where you want your oil to be doing its job!
• Consistent wall tolerances mean you can maintain clearances that are spot on, which is a must for any performance build.
• And if you're running a performance crankshaft, the enlarged ID chamfers on the bearing edges will accommodate those larger fillet radii without a hitch.

As for the specs, you’ve got options with sizes ranging from STD to .020, so you can find the right fit for your setup. The oil clearance is standard, and these bearings come in upper and lower half types. The tri-metal construction with hardened steel backs ensures durability and longevity, making them a solid choice for anyone serious about performance.

To give you a better idea of fitment, these bearings are perfect for a range of classic Chevys, including:

• Chevrolet Bel Air (1950-1975 & 1981)
• Chevrolet Corvette (1975-1982 & 1984-2013)
• Chevrolet Impala (1975-1985 & 1994-1996 & 2000-2020)

For example, they fit the 8B743P-01 ACL Chevrolet V8 396/402/427/454 with a .01mm oversized trimetal rod bearing set from '65 to '68. So, if you’re looking to keep your classic Chevy running strong, these bearings are a no-brainer.