No product in this selection is identified as a big-block crate motor, so buyers seeking one should verify engine displacement and block family before ordering. The closest listed engine choices are a Chevy 350 marine long block and a GM 350 HO small-block; the other listings include a 4.3L engine, an engine described as complete with limited fitment details, and a lifting bracket rather than a motor.
| Product | Best suited for | Important distinction |
|---|---|---|
| DM21 Chevy 350 Marine Long Block | Marine-engine shoppers | Listing identifies it as a 350 marine long block |
| GM 350 HO Deluxe | Buyers seeking a small-block V-8 | Iron Vortec heads; listed output is 330 hp |
| GM 4.3L Engine | Buyers needing a 4.3L LU3 | Listed output is 180–200 hp |
| 5801425058 Complete Engine | Shoppers matching listed reference numbers | Fitment must be verified |
| Muxlor Engine Lift Bracket | Engine-handling tasks | Not an engine |
DM21 Chevy 350 Marine Long Block
This listing names a marine long-block crate engine for a Chevy 350. It is the most relevant option here for a buyer specifically looking for a 350 marine engine, but the supplied product information does not provide horsepower, torque, included components, or detailed application fitment.
Best for: Buyers whose project calls for a Chevy 350 marine long block and who can confirm the listing’s exact configuration with the seller. It was selected because it is explicitly described as a marine crate engine.
Limitation: The available details do not establish whether this is a big-block engine. Do not assume that “350” means big-block; confirm engine family and marine application requirements before purchase.
GM 350 HO Deluxe With Iron Vortec Heads
This Genuine GM Performance Parts engine is identified as a small-block V-8 350 HO deluxe package with iron Vortec heads. The supplied specifications list 330 horsepower and 380 lb-ft of torque, giving shoppers concrete output figures for comparison.
Best for: Buyers looking for a specified-output small-block V-8 rather than a big-block. It was selected because its engine family, head type, horsepower, and torque are stated in the product details.
Limitation: This is explicitly a small-block, not a big-block. Check the package contents and vehicle fitment for the intended build before ordering.
Genuine GM Performance 4.3L LU3 Engine
The listed engine is a GM Parts 4.3L LU3, with stated output of 180–200 horsepower. The product information identifies it as a GM Performance Parts engine, but does not provide further details about included accessories or vehicle fitment.
Best for: Buyers whose replacement or project requirements specifically call for a 4.3L LU3. It was selected as a clearly identified engine option, not as a big-block substitute.
Limitation: The displacement and output make this a different choice from a big-block V-8. Verify the exact engine application and required components before purchase.
5801425058 Complete Engine
This listing describes a new complete engine and provides reference numbers 5801425058, 84188409, 84385274, and 84412177. The supplied details do not identify displacement, engine family, horsepower, or vehicle application, so the reference numbers are essential for evaluating a match.
Best for: Buyers who already have a matching reference number and can verify the application with the seller. It was included because it is presented as a complete engine.
Limitation: The listing notes that OEM numbers are for reference and asks buyers to verify fitment. It also warns that stock images may differ from the actual product; confirm both configuration and included parts.
Muxlor Removable Engine Lift Bracket
This is an engine-handling accessory, not a crate motor. Its listing describes a removable bracket for lifting and positioning engines, with a stated 5,600-pound capacity. It is described for use with engine stands, shop cranes, hoists, and related lifting setups.
Best for: Buyers who need a lifting accessory for engine handling, rather than an engine. It was selected only as a related item in the supplied product list.
Limitation: It does not include a motor. Check the bracket’s attachment requirements and the capacity of the complete lifting setup before use.
Buying Guide: How To Choose A Crate Motor
Do you specifically need a big-block engine?
Confirm the engine family in the listing or product documentation. “350” alone does not establish that an engine is a big-block; the GM 350 HO listed above is explicitly a small-block. If a big-block is required, do not substitute a small-block, 4.3L engine, or an engine with unspecified displacement without confirming that it suits the project.
Which specifications should you compare?
- Engine family and displacement: Match the required block type and size, not just a familiar model name.
- Output: Compare stated horsepower and torque when available. Only the GM 350 HO and 4.3L listings provide output figures in the supplied details.
- Application: Confirm whether the engine is intended for the vehicle or marine use in your project.
- Package contents: Ask what components are included; “long block,” “deluxe,” and “complete” do not provide the same level of detail in these listings.
- Fitment references: Cross-check part numbers and application information. A reference number alone does not guarantee compatibility.
What should marine buyers verify?
For the DM21 marine long block, confirm the exact engine configuration and intended marine application. The supplied product details do not state its horsepower, torque, or included components, so request those specifics before making a decision.
When is a lifting bracket relevant?
A lifting bracket can support engine handling, but it is not part of the engine itself. Verify that the attachment method and rated capacity suit the engine and lifting equipment being used.
Frequently Asked Questions
Is the GM 350 HO a big-block crate motor?
No. Its listing identifies it as a small-block V-8 350 HO with iron Vortec heads.
Does the DM21 listing confirm a big-block?
No. It identifies a marine long-block crate engine for a Chevy 350, but the supplied details do not specify the block family.
Which listed engine has stated horsepower and torque?
The GM 350 HO listing states 330 horsepower and 380 lb-ft of torque. The 4.3L LU3 listing states 180–200 horsepower.
Is the Muxlor product an engine?
No. It is a removable engine lift bracket intended for engine-handling setups.
What should I do when engine fitment is unclear?
Verify the engine family, application, reference numbers, and included components with the seller before ordering.