en-us Sat, 25 Apr 2026 10:13:59 GMT 184710007 https://media.racingjunk.com/short-block/184710007/lt-short-blocks-gm-iron-or-aluminum-block-callies-diamond.html Note: Price shown is for the LT4 short block. Click BUY NOW to get over to our website for L8T pricing and more details. GM's LT iron (L8T) and aluminum (LT4) blocks have proven to be strong performers. We have found these blocks able to reliably handle far more power than their LS predecessors. These short blocks benefit from our state-of-the-art CNC machining which provides a level of precision far beyond OE. All blocks are individually serialized on our 4-axis CNC for traceability. We…

]]> Engines: GM/Chevrolet: Short Block Fri, 24 Apr 2026 07:50:04 GMT 184160518 https://media.racingjunk.com/short-block/184160518/ls-next2-427-cubic-inch-shortblock-for-big-boost.html This is the last stop before going to a billet block. In fact, that's exactly the path that the owner of the car in the video took. He rang up 2,740 horsepower to the wheels with this combination. He then moved up to one of our billet block builds and bigger turbos for even more power. Before getting too much deeper here, you should click the BUY NOW link to get over to our website. We have lots more info posted there as we are not constrained by format. Still reading? Okay. Parts Lists -…

]]> Engines: GM/Chevrolet: Short Block Fri, 24 Apr 2026 07:50:04 GMT 184145988 https://media.racingjunk.com/short-block/184145988/408-ci-ls-short-block-for-na-street-.html This short block is intended to be used in a naturally aspirated build. Its design is very similar to our 370 cubic inch, boost-ready LS short block. This NA version has a stroker crank for more displacement, flat top pistons for a little bit more compression and a slightly different hone finish on the cylinder walls. Going to a 4.000" stroke with a 4.030" bore diameter brings us to 408 cubic inches. Our standard recipe NA engine builds with this short block typically fall into the 675 - 750…

]]> Engines: GM/Chevrolet: Short Block Fri, 24 Apr 2026 07:50:04 GMT 183941253 https://media.racingjunk.com/short-block/183941253/brand-new-434-shortblock.html 434 short block assembly...... consist of dart shp block, 4340 4.000 crank, 6.000 h-beam rods w/2000 bolts, mahle forged dome pistons, plasma moly file fit rings, hp bearings, brass freeze plugs, fel pro rear main seal, square decked, bored and finished honed, prepped, balanced and assembled. ready for u to complete.. $6695.00 call andy 336-476-5410

]]> Engines: GM/Chevrolet: Short Block Fri, 24 Apr 2026 07:50:04 GMT 183929024 https://media.racingjunk.com/short-block/183929024/brand-new-632-shortblock-sportsman.html 632 shortblock. just add all your accessories and go. this combo consist of merlin IV block, 4340 callies 4.750 crank, callies h-beam rods w/arp bolts, ross dome pistons, plasma moly rings, hp bearings, brass freeze plugs, rear main seal, it is square decked, bored and finish honed, prepped, and assembled for just $7995.00--- call andy or Ronnie 336-476-5410

]]> Engines: GM/Chevrolet: Short Block Fri, 24 Apr 2026 07:50:04 GMT 184754711 https://media.racingjunk.com/short-block/184754711/427ci-dart-ls-next-iron-short-block-for-boost.html This 427ci LS iron short block is ideal for intermediate range boost. The Dart block is a big leap over a GM block as is the Callies 8-counterweight crank (details below). Add in the Callies rods, Diamond pistons, upgraded fasteners, our precision CNC machining and you've got a dependable short block that will last. Here is what you're getting: - Dart LS Next SHP Block - 4.125" bore - Callies' fully counter-weighted (CCW) Apex crankshaft - Calico coated rod and main bearings…

]]> Engines: GM/Chevrolet: Short Block Thu, 23 Apr 2026 07:50:02 GMT 184740496 https://media.racingjunk.com/short-block/184740496/632-bb-chev-short-block-parts-kit-only-pump-gas-all-new-.html . --Inventory CLEAR OUT--.BB Chev 632 cu in "PUMP GAS" Short Block PARTS ONLY KIT !--ALL NEW >>KIT INCLUDES--10.2 Deck 4 BOLT MAIN BLOCK, "MANUFACTURED in USA" by BPE ( Blueprint Engines) 4.600/4.595" Bore along with MANLEY  FORGED 4340 STEEL 4.750" STROKER CRANKSHAFT + EAGLE H-BEAM  4340 FORGED STEEL "H-BEAM" "Stroker" Connecting RODS, 6.700 Long with ARP Rod Bolts and a Set  of PUMP GAS Friendly FORGED PISTONS by RACE TEC.…

]]> Engines: GM/Chevrolet: Short Block Wed, 22 Apr 2026 07:50:02 GMT 184730096 https://media.racingjunk.com/short-block/184730096/632-bb-chev-short-block-parts-kit-only-pump-gas-all-new-.html . --Inventory CLEAR OUT--.BB Chev 632 cu in "PUMP GAS" Short Block PARTS ONLY KIT !--ALL NEW >>KIT INCLUDES--10.2 Deck 4 BOLT MAIN BLOCK, "MANUFACTURED in USA" by BPE ( Blueprint Engines) 4.600/4.595" Bore along with MANLEY  FORGED 4340 STEEL 4.750" STROKER CRANKSHAFT + EAGLE H-BEAM  4340 FORGED STEEL "H-BEAM" "Stroker" Connecting RODS, 6.700 Long with ARP Rod Bolts and a Set  of PUMP GAS Friendly FORGED PISTONS by RACE TEC.…

]]> Engines: GM/Chevrolet: Short Block Wed, 22 Apr 2026 07:50:02 GMT 184706734 https://media.racingjunk.com/short-block/184706734/540-bb-chev-new-brodix-solid-aluminum-block-winberg-grp.html 10.200 4.500 BORE SOLID BLOCK FRESH HONE WINBERG BILLET CRANK NEW GRP PRO RODS DIAMOND 12.5N TO ONE PROMOD PISTONS HEMI PINS TOTAL SEAL HELL FIRE RINGS CLEVITEE COATED BRGS 20K INVESTED SELL FOR 11K RODS PISTONS PINS RINGS BRGS ARE NEW, BRODIX BLOCK 4.600 BORE STRAIGHT ROUND AND NEVER HURT CRANK LIKE NEW STD STD THIS IS A 20K PRO MOD ALCOHOL SHORT BLOCK WILL SELL FOR 13K CONTACT MIKE 513-607-2592 VOICE OR TEXT AFTER 12 IS BEST mikejw5@cs.com

]]> Engines: GM/Chevrolet: Short Block Tue, 21 Apr 2026 07:50:03 GMT 182689746 https://media.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, 21 Apr 2026 07:50:03 GMT 182683469 https://media.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, 21 Apr 2026 07:50:03 GMT 184140148 https://media.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, 20 Apr 2026 07:50:03 GMT