ATK HP94C High Performance GM 383 Stroker Fully Dressed Crate Engine

Everything bolts to this 383 already: ATK's HP94C is the turn-key, fully dressed stroker in the lineup, producing 415 horsepower with 460 foot-pounds of torque. Unlike the bare or mid-dress versions of this stroker, it arrives essentially ready to run.

Why "turn-key" matters here

ATK built this as a Stage 3 long block for buyers who want stroker power without sourcing a shopping list of separate parts. The carburetor, distributor, and oil pan ship in place, along with the valve covers, the water pump, a harmonic balancer, and a flexplate, plus spark plugs and matching wires. Large-valve aluminum cylinder heads sit over a hydraulic roller camshaft, and the rear main seal uses a one-piece design.

What is under the dress

This stroker combination carries a 9.7:1 compression ratio on a 4.040-inch bore and 3.750-inch stroke and internal/external engine balance worth checking against your own flexplate or flywheel if you ever swap it. ATK recommends 91 to 93 octane fuel. Because so much is already bolted on, check header and accessory clearance for your specific Chevy chassis before ordering, since a fully dressed long block leaves less room to swap individual parts later.

Q: Do I still need to buy a carburetor or distributor? No, both ship installed, along with the intake manifold and ignition components.

Few other listings in this stroker family ship this complete, which is worth weighing against the extra cost of a fully dressed long block.