You need a replacement engine and every listing says either “long block” or “short block.” If you’re not sure what the difference is or which one you actually need, you’re in the right place. It’s simpler than it sounds.
The Short Answer
- Long block = a nearly complete engine. Block, crankshaft, pistons, rods, camshaft, timing set, cylinder heads, and valvetrain. You bolt on your intake manifold, exhaust manifolds, and accessories and you’re ready to go.
- Short block = the bottom half of the engine only. Block, crankshaft, pistons, and connecting rods. You supply everything else — heads, cam, timing, intake, and valvetrain.
Think of it this way: a long block is a replacement engine. A short block is a foundation for building your own engine.
What’s Included: Side by Side
| Component | Short Block | Long Block |
|---|---|---|
| Engine block | Yes | Yes |
| Crankshaft | Yes | Yes |
| Pistons and rings | Yes | Yes |
| Connecting rods | Yes | Yes |
| Camshaft | No | Yes |
| Timing chain/gears | No | Yes |
| Cylinder heads | No | Yes |
| Valves, springs, retainers | No | Yes |
| Lifters/tappets | No | Yes |
| Head gaskets | No | Yes |
| Intake manifold | No | No |
| Exhaust manifolds | No | No |
| External accessories | No | No |
Both options still require you to transfer or buy an intake manifold, exhaust manifolds, and all external accessories — alternator, water pump, power steering pump, A/C compressor, starter, and wiring.
When to Buy a Long Block
You want a replacement engine that gets your vehicle back on the road. A long block is the closest thing to a drop-in solution. You pull the old engine, bolt the long block onto your transmission, transfer your intake and accessories, and fire it up.
A long block is right for you if:
- Your engine failed and you want a warrantied replacement
- You want to minimize the parts you need to source separately
- You’re not building a custom setup — you just need it to work
- You’re paying a shop for labor and want to keep the job simple and fast
Most replacement buyers want a long block. It’s less hassle, fewer separate purchases, and less risk of compatibility issues from mixing and matching components.
Shop remanufactured long block engines at Bishop Car Parts →
When to Buy a Short Block
You’re building a custom engine and you already know what heads and cam you want. A short block gives you a fresh, balanced bottom end and lets you choose every component above the deck surface.
A short block is right for you if:
- You have a specific camshaft and cylinder head combination picked out
- You’re building for performance and want to control compression ratio, cam timing, and airflow
- You already own the heads, cam, and valvetrain from a previous build or upgrade
- You’re an experienced builder or working with a machine shop
Short blocks are popular with hot rod builders, racers, and enthusiasts who see the engine as a project, not just a part to swap.
Shop remanufactured short block engines at Bishop Car Parts →
Price Comparison
| Short Block | Long Block | |
|---|---|---|
| Remanufactured (typical GM V8) | $1,000–$2,000 | $1,800–$4,000 |
| Additional parts needed | Heads ($300–$1,500+), cam/timing ($100–$500), lifters ($50–$200), head gaskets ($50–$100) | Intake manifold, exhaust manifolds, accessories |
| Total cost to run | $1,500–$4,200+ | $2,000–$4,500+ |
| Labor to assemble | Higher — the top end needs to be built and assembled | Lower — most of the engine is already together |
When you add up the cost of buying heads, a cam, lifters, timing set, and head gaskets separately, a short block build can approach or exceed the cost of a long block — especially if you’re buying quality components. The short block path only saves money if you already own the top-end parts.
See current pricing on long blocks and short blocks at Bishop Car Parts.
What About a Complete Engine (Turnkey)?
Some sellers offer “complete” or “turnkey” engines — a long block with the intake manifold, distributor (if applicable), and sometimes even the water pump and accessories pre-installed. These are the ultimate plug-and-play option but command a premium.
For most replacement jobs, a long block plus your existing intake and accessories is the sweet spot between convenience and cost.
Bottom Line
| Your Situation | Buy This |
|---|---|
| Engine died, need a replacement, want it running ASAP | Long block |
| Building a hot rod, resto-mod, or performance project | Short block |
| Don’t want to think about parts compatibility | Long block |
| Already have heads, cam, and valvetrain from another build | Short block |
| Paying a shop — want to minimize labor hours | Long block |
Most buyers need a long block. If you’re reading this article trying to figure out which one to order for a vehicle that’s sitting dead in the driveway, get the long block.
