en-us Thu, 23 Apr 2026 04:18:51 GMT 184782794 https://news.racingjunk.com/long-block/184782794/ls-5.7-chevy-gm-gmc-swap-longblock.html LS 5.3 bored to 5.7 Gen 3 Flattop LS pistons 3.908 bore Custom cam 212dur .538 lifr 112lc 862 heads BTR valve springs

]]> Engines: GM/Chevrolet: Long Block Tue, 21 Apr 2026 19:41:59 GMT 184724620 https://news.racingjunk.com/long-block/184724620/boost-ready-dry-sump-lt4-long-block-376-or-416-ci.html GM's aluminum LT production block has proven itself to be a strong performer. We see this long block as being able to reliably handle to 1,200 hp. That could not be said about its aluminum LS predecessor. We switch to an aftermarket LS block over about 750hp. Aftermarket aluminum blocks are a high-cost upgrade. An LT's design provides a number of other benefits over its LS predecessor. The key characteristic of an LT is direct injection. This provides greater control over the…

]]> Engines: GM/Chevrolet: Long Block Tue, 21 Apr 2026 07:50:03 GMT 182685226 https://news.racingjunk.com/long-block/182685226/borowski-custom-dart-ls-next-aluminum-long-block.html This long block is for someone that wants bulletproof so they won't cringe every time they turn up the boost. Like in the video. The recipe for this piece has further evolved since the video was shot back in 2018. We now use a skirted Dart aluminum LS Next engine block and upgrade it to 1/2" head studs and machine the lifter bores to 0.904" for larger, more robust lifters. Callies has also introduced their new Apex crank line. Its performance is comparable to their Magnum line…

]]> Engines: GM/Chevrolet: Long Block Tue, 21 Apr 2026 07:50:03 GMT 184492229 https://news.racingjunk.com/long-block/184492229/4-500-hp-rated-462ci-billet-ls-long-block.html This billet LS long block uses a highly optimized, but well-proven LS architecture. The parts are from manufacturers of proven quality, but replacements can be sourced from alternate vendors if the need ever arises. This mitigates the risk of total reliance on a single vendor with their own exotic engine design and sole-source, proprietary parts. Proven conventional architecture also beats exotic in cost, size, weight and complexity. If conventional works just as well, why would you want to…

]]> Engines: GM/Chevrolet: Long Block Sun, 19 Apr 2026 07:50:03 GMT 184430081 https://news.racingjunk.com/long-block/184430081/boost-ready-big-block-chevy-555ci-long-block.html PHOTOS INCLUDE OPTIONAL BILLET INTAKE MANIFOLD This 555 cubic inch BBC long block is built to handle serious boost. It features top quality parts conbined with precision CNC machining and assembly that was recognized by Engine Builder Magazine's with their top award. The foundation is a Dart Big M, 10.2 inch tall-deck block with billet steel main caps for extraordinary strength. The block undergoes multiple machining steps on our 4-axis CNC which has a precision of 0.0002 inches before moving…

]]> Engines: GM/Chevrolet: Long Block Sat, 18 Apr 2026 07:50:03 GMT 184630056 https://news.racingjunk.com/long-block/184630056/370ci-ls3-port-iron-long-block-630hp.html This digitally remastered 370 cubic inch LS long block delivers a lot of bang for the buck. Our CNCs have machined these seasoned GM block, crank and heads to far beyond their original condition. Pairing these parts with superior quality aftermarket components allows us to pull out 630 horsepower on pump gas at a budget friendly price. The 6.0L iron GM blocks are bored and decked on our 4-axis which boasts a precision of 0.0002" and 1/1,000th of a degree. We also engrave and serialize the blocks…

]]> Engines: GM/Chevrolet: Long Block Fri, 17 Apr 2026 07:50:03 GMT 184127686 https://news.racingjunk.com/long-block/184127686/boost-ready-370ci-ls-long-block-afr-ls3-cnc-d-heads.html Looking for some serious power at a great price? Look no further! This 370ci boost-ready LS long block is designed to easily handle more than 1,000 hp. The AFR, LS3, 6-bolt, 12-degree valve angle castings provide great airflow and were built to handle boost. Our process for machining these heads includes CNC porting and combustion chamber machining on our 5-axis with CNC valve job and bowl bowl blend on our Newen CNC seat & guide machine (see Engine Machining playlist on our YouTube channel…

]]> Engines: GM/Chevrolet: Long Block Fri, 17 Apr 2026 07:50:03 GMT 184765898 https://news.racingjunk.com/long-block/184765898/big-block-chevy-567.5-complete-long-block.html For sale is a 567.5 cubic inch Big Block Chevy, professionally built and recently freshened. This is a complete long block from carburetor to oil pan, ready for installation. Specs: Bore: 4.610 Stroke: 4.250 Displacement: 567.5 CID Components: JE Pistons Manley Connecting Rods Callies Crankshaft Morel Lifters Crane Camshaft Quick Fuel Carburetor Build Info: Originally built by Steve Schmidt Recently freshened by High Risk Performance Condition: Complete long block Carburetor to pan Freshened and…

]]> Engines: GM/Chevrolet: Long Block Sat, 11 Apr 2026 15:46:36 GMT 182254994 https://news.racingjunk.com/long-block/182254994/396-427-454-s-blks-and-heads.html if your looking for a 65 to 75 big block many heads and blks in stk many date codes available contact vintagebigblocks.com david has 300plus in stk or call 716-763-6200 he has your muscle car needs we can complete and dyno them also stevesautoandmachine.com

]]> Engines: GM/Chevrolet: Long Block Fri, 10 Apr 2026 07:50:02 GMT 184682949 https://news.racingjunk.com/long-block/184682949/gm-604-engine-freshened-by-mcgunegill.html Fresh from McGunegill Race Performance, GM 604 with zero laps. Includes distributer, wires and front end kit. Ready to GO! $10,000 OBO

]]> Engines: GM/Chevrolet: Long Block Tue, 31 Mar 2026 07:45:10 GMT 184055205 https://news.racingjunk.com/long-block/184055205/454-chevy-engine-for-sale.html 454 Engine For Sale 500+ HP and 550+ Ft Pounds of Torque -Gen 4-4 Bolt Main Block -Fully Prepped and Machined -Tanked, Shot Peened, Bored, Honed, and aligned Honed -ARP Main Bolts -Cam Bearing -Brass Freeze Plugs -4340 Forged Scat Crank -Scat 4340 "Dimple" Rods w/7/16" Bolts -Speed Pro Forged Pistons -Fully balanced rotating Assembly -Clevite H Series Main and Rod Bearings -Nodular Iron Harmonic balancer -Scat SFI Flexplate -Total Seal Moly Rings -Melling HV Oil Pump w/HD Steel Drive -Fel-Pro…

]]> Engines: GM/Chevrolet: Long Block Tue, 24 Mar 2026 07:45:10 GMT 184331244 https://news.racingjunk.com/long-block/184331244/364-cubic-late-model-engine.html 364 Cubic Inch Steel Block Late Model Engine. Complete ready to sit in car and race. All light weight parts. Cost $42,000 to build.

]]> Engines: GM/Chevrolet: Long Block Fri, 20 Mar 2026 07:45:12 GMT