Equipped with a 4.125" big bore engine block and a 4.000" stroke forged crankshaft, this engine packs a punch! Using only top of the line components like a fully forged rotating assembly, hydraulic roller camshaft and aluminum heads, the 427" Long Block is the engine your car needs. Check out our custom options and packages below to find your perfect combination! Block: Dart SHP 4 Bolt Mains, 9.025" Deck Height, 1 Piece Seal, 4.125" BoreCrankshaft: Smeding 4340 Forged Steel, Internal Balance,...

Block: Dart SHP 4 Bolt Mains, 9.025" Deck Height, 1 Piece Seal, 4.125" BoreCrankshaft: Smeding 4340 Forged Steel, Internal Balance, 4.000" StrokeRods: Smeding 4340 Forged Steel H-Beam with 7/16" Bolts, 6.000" LengthPistons: Custom 2618 Forged Aluminum, 19cc Dish, Coated SkirtsRings: Stainless Steel Top, Napier 2nd, Low Friction Oil, 1.2/1.2/3.0Compression Ratio: 10.7:1 w/ 64cc Heads, 10.0:1 w/ 72cc HeadsWarranty: 3 Year, Unlimited Miles Camshaft Kit includes camshaft, hydraulic roller lifters...

Block: Smeding Heavy Duty w/ Billet 4 Bolt Mains, 4.125" Bore, 9.5" Deck HeightCrankshaft: Smeding 4340 Forged Steel, Internal Balance, 4.000” StrokeRods: Smeding 4340 Forged Steel H-Beam with 7/16" Bolts, 6.200" LengthPistons: Custom 2618 Forged Aluminum, 10.0:1 Compression, Coated SkirtsRings: Plasma-Moly Top, Low Friction Oil, 1/16” x 1/16” x 3/16”Rocker Arms: Smeding 1.6 Ratio, 7/16" Stud, Full-RollerCylinder Heads: Smeding Aluminum 205cc, 2.08"/1.60" Valves, 58cc Chambers Warranty: 3 Yea...

Block: Smeding Heavy Duty w/ Billet 4 Bolt Mains, 4.125" Bore, 9.5" Deck HeightCrankshaft: Smeding 4340 Forged Steel, Internal Balance, 4.000" StrokeRods: Smeding 4340 Forged Steel H-Beam with 7/16" Bolts, 6.200" LengthPistons: Custom 2618 Forged Aluminum, 27.5cc Dish Volume, Coated SkirtsRings: Plasma-Moly Top, Low Friction Oil, 1/16" x 1/16" x 3/16" Camshaft Kit includes camshaft, hydraulic roller link-bar lifters, roller timing set & thrust plate - Installed Cam Specs:460hp: .508”/.532...

Remember when the 427" Ford was the king of the street and track? It is more than 60 years later and now you can now have the same cubic inches in a lightweight, smaller package that makes more power than the original big-blocks did. Because it is based on a 351" Windsor, the Smeding Performance 427" Windsor will fit perfectly in your Mustang, kit car or hot rod.  Block: Smeding Heavy Duty w/ Billet 4 Bolt Mains, 4.125" Bore, 9.5" Deck HeightCrankshaft: Smeding 4340 Forged Steel, Internal B...

Each Smeding 441" LS is meticulously assembled with the highest attention to detail and precision. Bearing clearance & ring gaps are measured, verified and set for each application's unique demands. We can also assist with selecting the correct camshaft for your build and goals! Call 210-446-0960 for more information. Block: Dart SHP Iron, 6 Bolt 7/16" Head Threads, 7/16" Main Bolts, 4.125" BoreCrankshaft: Smeding 4340 Forged Steel, Internal Balance, 4.125" Stroke, 58xRods: Smeding 4340 F...

Each Smeding 441" LS is meticulously assembled with the highest attention to detail and precision. Bearing clearance & ring gaps are measured, verified and set for each application's unique demands. We can also assist with selecting the correct camshaft for your build and goals! Call 210-446-0960 for more information. Block: Dart SHP Iron, 6 Bolt 7/16" Head Threads, 7/16" Main Bolts, 4.125" BoreCrankshaft: Smeding 4340 Forged Steel, Internal Balance, 4.125" Stroke, 58xRods: Smeding 4340 F...

Each Smeding 441" LS7 Short Block is meticulously assembled with the highest attention to detail and precision. Bearing clearance & ring gaps are measured, verified and set for each application's unique demands. We can also assist with selecting the correct camshaft for your build and goals! Call 210-446-0960 for more information. Block: Dart SHP Iron, 6 Bolt 7/16" Head Threads, 7/16" Main Bolts, 4.125" BoreCrankshaft: Callies Compstar 8-Cwt LS7, Internal Balance, 4.125" Stroke, 58xRods: ...

***This is a hidden product used with the Product Options application, Please do not delete this product.***

***This is a hidden product used with the Product Options application, Please do not delete this product.***

***This is a hidden product used with the Product Options application, Please do not delete this product.***

***This is a hidden product used with the Product Options application, Please do not delete this product.***

Nothing attracts attention like a fully polished 8-71 blower poking out of the hood. With the thump of the exhaust and the whine of the blower, people will know you have arrived. This engine produces 800 tire burning horsepower and is streetable. "Tame?" give me a break, we are talking about a blown 540" cubic inch Chevy here. This engine will put you in the back of your seat and make your passengers look for something to hold on to. Block: Dart Big M Sportsman, 4.500" Bore, 9.8" Deck Height...

Block: Dart Big M Sportsman, 4.500" Bore, 9.8" Deck HeightCrankshaft: Smeding 4340 Forged Steel, Internal Balance, 4.250" StrokeRods: Smeding 4340 Forged Steel H-Beam with 7/16" Bolts, 6.385" LengthPistons: JE Forged Aluminum, Flat Top, 9.0:1 CompressionRings: Plasma-Moly Top, Std Friction Oil, 1/16" x 1/16" x 3/16" Camshaft: Smeding Hydraulic Roller, .614”/.614” Lift, 239°/249° Duration @ .050”Rocker Arms: Scorpion 1.7 Ratio, 7/16" Stud, Full-RollerCylinder Heads: Smeding 315cc Intake Port, ...

Block: Dart Big M Sportsman, 4.500" Bore, 9.8" Deck HeightCrankshaft: Smeding 4340 Forged Steel, Internal Balance, 4.250" Stroke - Dual KeyRods: Smeding 4340 Forged Steel H-Beam with 7/16" Bolts, 6.385" LengthPistons: JE 2618 Forged Aluminum, Coated Skirts, 9.0:1 Comp w/ 120cc ChambersRings: Plasma-Moly Top, Std Friction Oil, 1/16" x 1/16" x 3/16"Warranty: 3 Year, Unlimited Miles Camshaft Kit Includes: camshaft, hydraulic roller lifters, roller timing set, & thrust plate - Installed Cam S...