Ford Racing Boss 363

Mod motors might be coming into their own right now, but the pushrod 302 still has plenty of fight left in it. For decades, people have been stroking their 302s to 347 ci by combining a .030-inch overbore with a 3.400-inch crank. Now Ford Racing has upped the ante by taking the same formula, but with the addition of a massive 4.125-inch bore afforded by the Boss 302 siamesed-bore block for a total of 363 ci. In applications where engine bay clearance is at a premium, the 8.200-inch deck block will fit in just about anything, and the forged rotating assembly is ready for abuse. Airflow comes from a set of Ford Racing 204cc aluminum castings, and when combined with an Edelbrock Super Victor intake and 750-cfm carb, Ford says that the 363 is good for 500 hp. The Boss 363 is offered in long-block trim complete with an oil pan and water pump. Throw on an intake, distributor, and carb and you’re ready to get cookin’.

By The Numbers

Displacement: 363 ci

Bore/stroke: 4.125 x 3.400 inches

Compression ratio: n/a

Camshaft: 232/240-at-.050 hydraulic roller

Output: 500 hp and 450 lb-ft

Price: $8,500

GMPP LSA

You got to love boost. Plop a positive-displacement TVS huffer on top of an already potent Gen IV long-block, and great things will happen. Not only does the GM Performance Parts LSA small-block pack 556 hp, it boasts the streetablity afforded by a modest hydraulic roller cam. The LSA crate motor is the same lump that powers the Cadillac CTS-V and the upcoming Camaro ZL1, which means that it’s essentially a detuned LS9. Somewhat surprisingly, GM has enough faith in the LSA’s electronics to fit the short-block with powdered metal rods and hypereutectic pistons, but rest assured that this thing is bulletproof. It comes complete from supercharger to oil pan, and also includes the coil packs, injectors, water pump, and balancer. Just add a computer, wiring harness, and an accessory drive and fire it up. Best of all, the LSA offers 87 percent of the LS9 crate motor’s power for 66 percent of the money.

By The Numbers

Displacement: 376 ci

Bore/stroke: 4.065 x 3.622 inches

Compression ratio: 9.1:1

Camshaft: 198/216-at-.050 hydraulic roller

Output: 556 hp and 551 lb-ft

Price: $17,500

Mast LSX 454 SS

In 1970, GM unleashed the 454ci LS6 big-block, one of the most legendary motors from the muscle car era. While it was officially rated at 450 hp, and rumored to produce closer to 500, neither figure comes close to the 711 horses that Mast Motorsports’ LSX 454 churns out. The kicker here is that the Mast 454 is a Gen IV small-block, not a big-block, and it gets the job done with a mild hydraulic roller cam. The pump-gas-friendly combo boasts a GMPP LSX block, a forged rotating assembly, a FAST intake manifold, and Mast’s own LS7 cylinder head castings. Built with drop-in-and-go simplicity in mind, the 454 comes complete with an oil pan, water pump, fuel rails, injectors, coil packs, a wiring harness, all necessary engine sensors, and Mast’s M90 stand-alone computer.

By The Numbers

Displacement: 454 ci

Bore/stroke: 4.185 x 4.125 inches

Compression ratio: 12.0:1

Camshaft: 246/260-at-.050 hydraulic roller

Output: 711 hp and 633 lb-ft

Price: $17,995

Smeding E-Series 383

Like most crate engine manufacturers, Smeding Performance offers a full line of mega-horsepower small- and big-blocks. In recent years, however, customer demand for a no-nonsense, economically priced small-block Chevy led to the development of the E-Series 383. For about the same money as you’ll spend reconditioning a well-worn 350 core, Smeding will build you a 420hp 383 that includes a brand-new GM four-bolt block, a cast-steel crank, forged rods, and hypereutectic pistons. The top end consists of an Edlebrock RPM Air-Gap intake manifold and carb, as well as a set of aluminum heads. The 383 includes a new distributor, spark plugs, plug wires, oil pan, and balancer. All you need to add is a water pump. Smeding is so confident in the durability of its motors that it includes a three-year, unlimited-mile warranty.

By The Numbers

Displacement: 383 ci

Bore/stroke: 4.000 x 3.800 inches

Compression ratio: 9.5:1

Camshaft: 230/236-at-.050 hydraulic flat tappet

Output: 420 hp and 450 lb-ft

Price: $4,295