Power Lunch

Shafiroff 540ci Ultra Street Engine
Huge power is yours when you stuff 540 inches of Rat motor into your musclecar. Based on a GEN VI four-bolt big-block, this powerhouse features Dart Pro 1 325cc aluminum heads, a COMP Cams Street roller, and Mahle forged pistons. The engine comes with a 24-month warranty.

GM Performance Parts 350 H.O. Deluxe crate engine from summit racing
Power and value in a no-hassle package! Building upon the popularity of the value-leading 350 H.O. crate engine, the new 350 H.O. Deluxe adds a 600-cfm Holley carburetor, an HEI distributor, a long-style water pump, a Vortec aluminum intake, an 8-inch harmonic balancer, and a 12 3/4-inch flexplate to the package. Features include a pump-gas-friendly 9.1:1 compression ratio, a nodular cast iron crank, powdered metal connecting rods, 64cc Vortec cylinder heads, and a hydraulic flat tappet cam. This economical little powerhouse delivers 330 hp at 5,000 rpm and 380 lb-ft of torque at 3,800 rpm. It's perfect between the fenders of your favorite musclecar or grassroots racer.

GM Performance Parts ZZ502 Crate Engine from summit racingFully assembled from intake manifold to oil pan, this 502-incher is just about as close to a custom-built race motor as you can get. With a street-friendly 9.6:1 compression, this big-block cranks out 502 hp at 5,200 rpm and a frame-twisting 567 lb-ft of torque at 4,200 rpm. Features include a cast iron four-bolt main block, forged pistons, forged steel connecting rods and crankshaft, a hydraulic-roller cam, aluminum oval port heads with 110cc combustion chambers, a CNC-ported dual plane aluminum intake manifold, a Holley 850-cfm carburetor and more.

World Products Merlin 540 Rat Motor engine
Make mammoth power with this World Class 540-inch Rat motor from World Products. At the foundation is a new Merlin block that uses improved oiling and cooling passages to ensure a high level of reliability. Inside are Mahle forged pistons, a forged crank; up top, World Merlin aluminum heads featuring Manley Street Master valves measuring 2.30/1.88 inch. The works has Two-year/24,000-mile warranty.

World Products All-Aluminum Motown 427 SBC
With a big 4.125-inch bore, 4-inch stroker crank, and 10:1 compression, Bill Mitchell's brawny all-aluminum 427ci small-block pumps out 530 hp with complete reliability and weighs only 435 pounds complete. The engine is built from World's new Motown Lite block, which is made of 357-T6 aluminum and is reinforced in all critical areas and then assembled with components from ARP, Clevite, Crane Cams, Eagle, Fel-Pro, Mahle, Manley, and Milodon. World's highly effective Motown Lite cylinder heads are employed with 220cc intake runners. Backed by a two-year/24,000-mile warranty.

Speed-O-Motive 725hp Blown Mouse Motor Race Engine
Make them run for cover with this killer combo from Speed-O-Motive. This engine produces 595 lb-ft at 5,000 rpm and 725 hp at 6,500 rpm. Built with premium forged components, including 4340 steel crank and rods, Dart 230cc aluminum heads, a COMP Cams solid-roller camshaft, and a Littlefield 8-71 supercharger presiding over it all.

Larry's Performance 383 Track Pro
Larry's Performance begins with a fully machined four-bolt-main small-block and adds a balanced Scat rotating assembly with new SRP pistons to assemble its 383 Track Pro. The cylinder heads are a pair of World Products Track Pro 64cc assemblies and the custom-ground camshaft enables the Track Pro 383 to develop 420 hp at 5,500 rpm. The complete motor includes a set of chrome valve covers and an oil pan. Larry's offers a six-month/6,000-mile warranty for street-driven applications.

American Speed 396ci/510hp Small-Block Brutus
Put a big brute under your hood with this 510-horse small-block from American Speed Racing Engines. Built from a new GM four-bolt block, the innards include an ASE 4340-steel crankshaft and SRP forged racing pistons. The 9.8:1-compression 396 operates on pump gas to provide good driveability. At just 2,500 rpm, the engine delivers 450 lb-ft of torque and a very respectable 540 at 4,200 rpm. Airflow Research 195 CNC-ported aluminum heads are matched to an Edelbrock RPM intake. A custom Comp Cams hydraulic-roller cam is designed and installed for each engine combination and driving application. These engines come with a one-year/12,000-mile warranty.

American Speed 383ci/425hp Enforcer
One of American Speed's most popular crate engines is this 383ci 425hp Enforcer. Built to deliver a whopping 490 lb-ft of torque at 3,900 rpm, the small-block sports pump-friendly 9.6:1 compression and holds 14 inches of vacuum at an 850-rpm idle. Based on a new GM four-bolt block, the 383 swings an ASE nodular-iron crankshaft and 5.7-inch steel Super Stock rods. Up top, a pair of Edelbrock RPM aluminum cylinder heads and RPM intake manifolds work well with the ASE custom hydraulic camshaft. These engines come with a two-year/24,000-mile warranty.

Larry's Performance 496 Track Pro
If you're a Rat motor fan, Larry's Performance offers its 496 Track Pro, which grunts out 496 horses and 550 lb-ft of torque. The Rat motor is offered with two- or four-bolt mains and is fitted with a Scat rotating assembly. Next Larry's installs a set of SRP forged pistons, a special camshaft, and a pair of GM oval-port cylinder heads. This Rat is also offered with a six-month/6,000-mile warranty for street-driven applications.