If your pulse quickens at the mere sighting of this listing, you already know the significance of the Chevrolet LS7 454-cu.in. OHV V8. It was the ultimate form of 454 in its era and was a worthy successor to the legendary L88 427. This long-block featured a four-bolt-main cast-iron block; externally balanced, forged-steel crankshaft; forged-steel I-beam rods; GM/TRW, high-dome, forged-aluminum pistons; long-duration/high-lift GM solid-lifter camshaft; open-chamber, rectangular intake port, cast-iron heads; and a compression ratio of approximately 12.25:1. However, it arrived on the scene just as the tide was turning for muscle cars. Power-crushing emissions standards, ever-increasing insurance premiums and surcharges, vocal safety groups, and other forms of resistance would adversely impact muscle car sales in the early 1970s. Thus, the LS7 wasn’t factory installed in Chevrolet’s for public sale. It was instead offered over the counter as a “Heavy-Duty, Off-Road Use Only” engine for racers. With those 27-cubic-inches added over the 427, and output said to be north of 500-horsepower (depending upon the induction system and exhaust sourced and installed by the buyer), the LS7 was one of the most powerful engines of its day. This is a Brand-New NOS Authentic GM LS7 crate motor without the crate, so to speak, it was never installed or started. It was originally purchased for a 1969 Camaro that was being set up strictly for racing. Unfortunately, that dream wasn’t meant to be, and it was put up for sale. That’s when I bought it, sealed and covered it, and put it into dry storage in a heated building where it remained silent for over 20 years. Realizing that, at this point, I would probably never use it, I decided with a heavy heart to offer it up for sale. ENGINE NUMBERS On a pad, just behind the top of the timing-chain cover, “TL06XCH9” is stamped. “XCH” is the factory code for the LS7. A “74” is cast into the side of the block and the other stampings read E259, 4015445, and GM 3P.General Motors’ part number for this engine was XCH3965774. CONDITION As expected, the LS7 is perfectly preserved, brand new, and in excellent condition. The original GM paint is intact, as are the original GM part stickers, labels, and tags stating it is for ‘Heavy-Duty, Off-Road Use Only’ and ‘Use 100+ Octane Fuel Only. SUMMATION This engine will be sold on a bill of sale for proper transfer of ownership. This engine is very rare and very desirable. The exact number produced is unknown, which only adds to its mystique. If you are looking for a legendary V8 to power your current or next build, or a period-correct 500-plus-hp engine for a vintage drag car or a classic restoration, here it is. The last NOS LS7 that sold elsewhere commanded a price tag of 32K. * Will fit many other GM Years, Makes & Models. If you are unsure check with your parts supplier. I would prefer not to ship, Local Pick Up only or you can send the shipper of your choice.