en-us Thu, 14 May 2026 07:04:07 GMT 182689746 https://news.racingjunk.com/short-block/182689746/dart-ls-next-aluminum-custom-427ci-short-block-ls3-or-ls7.html BOROWSKI RACE ENGINES, INC. has established its position as the leading builder of Dart LS Next engines by being first in line with pre-production orders, working cooperatively with other top vendors to create custom solutions, building a wide range of extreme engines and maintaining inventory of key components. As a result of our effort, experience and investment, we can now offer world-class LS assemblies and engines on SHORT LEAD TIMES. Our standard LS Next displacement is 427 cubic inches.…

]]> Engines: GM/Chevrolet: Short Block Tue, 12 May 2026 07:50:03 GMT 182683469 https://news.racingjunk.com/short-block/182683469/dart-shp-ls-next-427-turbo-or-na-short-block-.html With both flat top and dish pistons available, this short block can be used for naturally aspirated or turbo builds with light to moderate boost up to 1,200 crank horsepower. For higher power requirements, please refer to our Racing Junk ad 182683489 with upgraded block, crank and rods. The Dart SHP LS Next is fully skirted and adds the convenience of directly bolting on GM covers and accessories without requiring oil spacer rails and remote oil filter adapters. SHP Features - Full side skirts…

]]> Engines: GM/Chevrolet: Short Block Tue, 12 May 2026 07:50:03 GMT 184140148 https://news.racingjunk.com/short-block/184140148/370ci-ls-shortblock-callies-rods-diamond-pistons.html If you are looking for a replacement short block for an engine with only a cam and head work, this could be a great choice for you. Our CNC machining and assembly paired with superior parts allows this short block to hit much higher levels of performance than new. Why? Better parts and essentially perfect dimensions, balance and surface finish. In our opinion, a seasoned GM block that we have precision machined, engraved and serialized on our CNCs is a better foundation than a new GM block. It…

]]> Engines: GM/Chevrolet: Short Block Mon, 11 May 2026 07:50:03 GMT 184785847 https://news.racingjunk.com/short-block/184785847/bbc-565-short-block-10.6-1-merlin-iv-molnar-mahle-in-stock.html IN STOCK NOW to SHIP BBC Assembled Short Block - 565 cid Merlin IV Iron block splayed 4-bolt mains Ductile iron caps with ARP main bolts Designed to fit GM OEM Drop-in Hydraulic Roller Lifters Provisions for OEM cam thrust plate and Lifter retainer 4.600 x 4.250 bore & stroke Internally Balanced (Use NON-Weighted balancer & flywheel) Premiu, Molnar Forged Crankshaft with 8 Counterweights Molnar Billet 4340 Steel H-beam rods Proprietary ARP2000 Rod Bolts with asymmetric threads Mahle 4032…

]]> Engines: GM/Chevrolet: Short Block Sun, 10 May 2026 21:10:17 GMT 184492242 https://news.racingjunk.com/short-block/184492242/4-500-hp-462ci-billet-ls-short-block.html This billet LS short 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 pay…

]]> Engines: GM/Chevrolet: Short Block Sun, 10 May 2026 07:50:03 GMT 184387932 https://news.racingjunk.com/short-block/184387932/555ci-bbc-shortblocks-various-dart-callies-j-e-combos.html Big Block Chevy has long been synonymous with Big Power. These engines are a proven, straightforward way to drop in big power. Borowski Race Engines (BRE) and Dart Machinery's history with BBC race engines goes back to about Day 1 of our common history in the late 60's. We are pleased to offer a range of 555 cubic short blocks using Dart Big M and Sportsman blocks to cover a wide range of applications. These short blocks are built from parts held in inventory so we can deliver them to…

]]> Engines: GM/Chevrolet: Short Block Sun, 10 May 2026 07:50:03 GMT 184151129 https://news.racingjunk.com/short-block/184151129/427-ci-aluminum-ls-short-block-for-na-rhs-std-or-dart-.html Available in either an RHS or Dart aluminum block, this short block is intended for naturally aspirated, pump gas applications. The RHS version includes the required custom timing cover. It is the foundation of our 800 horsepower, naturally-aspirated, pump gas build. This beast can drive to the track and tear it up when it gets there without breaking a sweat as you'll see in this ad's video. The foundation can be an RHS or optional Dart aluminum block. An aluminum block transfers heat better…

]]> Engines: GM/Chevrolet: Short Block Sun, 10 May 2026 07:50:03 GMT 184145797 https://news.racingjunk.com/short-block/184145797/370ci-ls-shortblock-for-boost-with-callies-8-cwt-crank.html This short block is intended for light boost to about 1,100 crank horsepower. The Callies Compstar center counterweighted crank with stock stroke brings a lot to the party. Having 8 instead of 6 counterweights increases stiffness by 25%. Harmonics are reduced because each cylinder has its own two counterweights. These two factors combine to minimize crank flexing thereby protecting the block, bearings and rods from excessive wear and fatigue. We have seen that using 8 counterweight cranks…

]]> Engines: GM/Chevrolet: Short Block Sun, 10 May 2026 07:50:03 GMT 184052673 https://news.racingjunk.com/short-block/184052673/new-540-cuin-b.b.-chevy-short-block.html NEW 540 cuin B.B. CHEVY SHORT BLOCK Dart 9.8 Block 10.5 : 1.0 CR Scat Crankshaft Scat H-Beam Connecting Rods SRP 10cc Dome Pistons Total Seal Molly Rings Fully machined, balanced, & assembled Other short blocks available CALL RON SPORL (504) 616-6005 for information

]]> Engines: GM/Chevrolet: Short Block Sat, 09 May 2026 21:11:08 GMT 184050577 https://news.racingjunk.com/short-block/184050577/new-565-cuin-b.b.-chevy-short-block.html NEW 565 B.B. CHEVY SHORT BLOCK Dart 9.8 Block SRP FT Pistons Lunati Crankshaft Scat H-Beam Connecting Rods Total Seal Molly Rings Fully Machined, Balanced, & Assembled Other Short Blocks Available CALL RON SPORL (504) 616-6005

]]> Engines: GM/Chevrolet: Short Block Sat, 09 May 2026 21:11:08 GMT 184050570 https://news.racingjunk.com/short-block/184050570/new-572-cuin-bb-chevy-short-block.html NEW-572 cuin B.B. CHEVY SHORT BLOCK Dart 10.2 Block Lunati Crankshaft Scat H-Beam Connecting Rods SRP FT Pistons Total Seal Molly Rings Fully Machined, Balanced, & Assembled Other Short Blocks Available CALL RON SPORL (504) 616-6005

]]> Engines: GM/Chevrolet: Short Block Sat, 09 May 2026 21:11:08 GMT 184050568 https://news.racingjunk.com/short-block/184050568/new-540-cuin-bb-chevy-short-block.html NEW - 540 cuin B.B. CHEVY SHORT BLOCK 10.5 : 1.0 CR Dart 9.8 Block Lunati Crankshaft Scat H-Beam Connecting Rods SRP 10cc Dome Pistons Total Seal Molly Rings Fully Machined, Balanced, & Assembled Other Short Blocks Available CALL RON SPORL (504) 616-6005

]]> Engines: GM/Chevrolet: Short Block Sat, 09 May 2026 21:11:08 GMT