en-us Tue, 16 Jun 2026 09:35:36 GMT 184801671 https://motorheadmedia.com/long-block/184801671/ls9-short-block-or-long-block.html Like new LS9 Spotless LS9 block with piston squirters 4.065 bores that are perfect. Dowel pinned billet steel main caps Very nice LS9 rods and pistons could reuse rings and bearings if someone chose to. LS9 crank standard mains and rods perfect condition New Katech LS9 dry sump pump that was sent to Katech as new pump LS9 heads very nice Comes with LS9 accessories pictured 7000$ obo for all of it, shipping available

]]> Engines: GM/Chevrolet: Long Block Mon, 15 Jun 2026 05:11:28 GMT 184492229 https://motorheadmedia.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, 14 Jun 2026 07:50:03 GMT 184430081 https://motorheadmedia.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, 13 Jun 2026 07:50:04 GMT 184630056 https://motorheadmedia.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, 12 Jun 2026 07:50:03 GMT 184127686 https://motorheadmedia.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, 12 Jun 2026 07:50:03 GMT 184331244 https://motorheadmedia.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, 12 Jun 2026 07:45:11 GMT 184801217 https://motorheadmedia.com/long-block/184801217/rebuilt-350-sbc-long-block-aluminum-heads.html Rebuilt 350 SBC Long Block Aluminum Heads 4 bolt main 9.6 compression ratio New 64cc aluminum heads, 2.02int/160exh valves, 200cc intake runners. New Summit 1103 hydraulic flat tappet, 444int/ 466exh lift, 224int/214exh duration @050, 112 lobe sep camshaft. New Comp Cams lifters. New 1.52 roller tip rockers arms New matches correct height pushrods. New Mahle 0.028 composite head gaskets. 0.020 over pistons. 0.010 under crankshaft. Moly piston rings. New King main & rod bearings. New King…

]]> Engines: GM/Chevrolet: Long Block Thu, 11 Jun 2026 09:35:26 GMT 184753431 https://motorheadmedia.com/long-block/184753431/dart-shp-ls-next-iron-long-block-mechanical-roller-lifters.html Our 427ci mechanical-roller, iron LS long blocks come in two primary flavors: conventional or copper head gaskets. This build uses Cometic MLX gaskets which have a max boost rating of 35 psi. Copper head gaskets with fuel hoops will hold far more pressure, but may require occasional torque adjustments. Those long blocks have a different part selection to better work with the higher boost levels. The top of our LS horsepower ladder is the 462ci billet aluminum long block. This long block is…

]]> Engines: GM/Chevrolet: Long Block Wed, 10 Jun 2026 07:50:04 GMT 184683036 https://motorheadmedia.com/long-block/184683036/555ci-bbc-long-block-hydraulic-roller-na-street.html This high quality, 555 cubic inch Big Block could be a big upgrade to your ride. This long block can either replace what you now have or be the foundation for a new custom build. We keep these long blocks in stock so it can be yours now. These long blocks feature a Dart block and Dart cylinders heads that we machine on our 5-axis CNC from porter castings. The head finish machining processes includes a CNC valve with bowl blending. The rotating assembly consistes of a Callies’ crank and rod…

]]> Engines: GM/Chevrolet: Long Block Wed, 10 Jun 2026 07:50:04 GMT 184665162 https://motorheadmedia.com/long-block/184665162/408ci-ls-long-block-for-na-720hp.html Is your project ready for its new LS? Our standard build 408 puts out 720 hp naturally aspirated. No supercharger or crazy cam needed. We get these results from our precision CNC machining, parts selection and tune. If you watch the videos in our @borowskirace YouTube Machining Playlist, you'll better understand how we put up such big numbers on this engine. The short block starts with a seasoned GM 6.0L block that we have digitally remastered to better than new condition. The mains are…

]]> Engines: GM/Chevrolet: Long Block Wed, 10 Jun 2026 07:50:04 GMT 182199578 https://motorheadmedia.com/long-block/182199578/dart-ls-hydr-roller-long-block-callies-diamond-all-pro.html This hydraulic roller long block is rated to 2,000 hp. We switch to a mechanical roller cam and Jesel shaft rocker system at anything over 2,000 crank horsepower, so that's a different long block. But let's focus on this one for now. Before getting into the details, check out this ad's video to see what John from Cutaway Racing has to say about this bad boy which he dubbed "Peanut Butter & Jelly". The engine block is the foundation any build. The Dart LS Next design…

]]> Engines: GM/Chevrolet: Long Block Wed, 10 Jun 2026 07:50:04 GMT 184798172 https://motorheadmedia.com/long-block/184798172/565-bbc-for-sale-sale-pending.html 565 big block chevy, Dart big m block, scat crank, eagle rods w/L19 bolts, mahle pistons and total seal gas port rings, brodix bb2 heads 355 cc intake ports, cometic gaskets, comp cams ultra steel rockers, jomar stud girdle, howards roller cam, .810 lift, isky red zone bushed lifters. milodon gear drive, edelbrock super victor intake, ati balancer, engine is externally balanced and smooth as glass. 5.41 @ 124 eighth, 10.90 at 147-48 in 2830 lb car. 240 passes on it to date. been a very trouble…

]]> Engines: GM/Chevrolet: Long Block Fri, 05 Jun 2026 16:41:29 GMT