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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesBluePrint Engines has introduced bare Ford-compatible blocks in 302-based and 351-based configurations for custom engine builds, according to FordMuscle’s February 2026 launch report. The listed 302 block has an 8.200-inch deck and 4.125-inch bore, and BluePrint says it is intended for stroker combinations up to 363 cubic inches. These are bare blocks, not complete engines; builders should verify the selected block’s specifications and fit with their machine shop before buying.
What BluePrint Engines launched
FordMuscle reports that BluePrint made its new bare Ford blocks available to the aftermarket after using them in its own engine builds. The launch includes an 8.2-inch-deck, 302-based configuration and a taller, approximately 9.5-inch-deck configuration for 351-based builds. The taller block’s possible displacement depends on the bore and stroke selected, so there is no single displacement figure that applies to every combination.
Frank Hromadka, identified by FordMuscle as BluePrint Engines’ product-design engineer, said the blocks originated because rebuildable core blocks were becoming harder to find: “We designed these several years ago because we were running out of core blocks to rebuild into engines. They’re getting harder to find, so we designed these, and we started using them in our crate engines.”
Documented 302 block specifications
| Specification | Listed 302 block |
|---|---|
| Manufacturer SKU | BPP12110342 |
| Deck height | 8.200 inches |
| Bore | 4.125 inches |
| Main caps | Ductile cast splayed main caps |
| Stroker displacement target | Up to 363 cubic inches, as stated by BluePrint |
| Origin and machining | Cast in Germany and machined in the USA, according to BluePrint |
| Displayed price | $2,599 when the product page was crawled; confirm current price |
Specifications, intended use, and the displayed price are from BluePrint Engines’ product listing. The price can change, and the displacement target is not a guarantee that every crank, rod, piston, or machining combination will fit.
#1 Best Overall
- 【Fitment】Compatible with Chevy SBC 302, 327, 350, 383 and 400 small-block engines manufactured in 1986.
- 【Specifications】Intake Valve Diameter: 2.020" | Exhaust Valve Diameter: 1.600" | Intake Port Volume: 200cc | Combustion Chamber Volume: 68cc | Intake Port: Square | Exhaust Port: Square | Spark Plug Angle : Straight | 23 Degree Intake & Exhaust Valve Angles | 3-Angle Valve Seat
- 【High Quality】High grade aluminum, bronze valve guides, hardened seats, advance port design for greater air flow. Lighter than Iron Heads, each Head weighs 10.33 kg. Dual pattern valve covers will accept either center bolt or perimeter bolt valve covers.
- 【High Performance】This head is 200cc intake runner with a 68cc combustion chamber, 68cc combustion chambers improve performance and retains stock compression on 1970 and earlier. This head has a thick deck design so they can be used on nitrous, turbocharged and supercharged applications.
- 【Note】This cylinder head does not have 400 stem holes. May require drilling if necessary. With pre-drilled accessory bolt holes. Valves, springs, retainers, hardware not included.
What is reported to differ from a stock block
FordMuscle describes additional material in the main webbing, thicker decks, reinforced bellhousing areas, priority-main oiling, Siamese bores, and splayed main caps. The publication reports that BluePrint compared approximately .900-inch webbing in specified areas with about .140 inch in stock blocks. Treat these as trade-reporting and company claims, not independent test results.
The available sources do not provide an independent durability test protocol, verified horsepower rating, or failure-rate comparison. Reinforcement is the company’s engineering rationale for the product; it should not be read as a guaranteed power limit or proof that the block will prevent failures.
Rank #2
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors.
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies
302 or 351-based block: what to compare
| Check | Why it matters |
|---|---|
| Deck height and engine family | The documented 302 listing is 8.200 inches; FordMuscle reports an approximately 9.5-inch-deck 351-based option. |
| Bore, stroke, and displacement | Confirm the planned dimensions with the block listing, engine builder, and machinist. The 363-cubic-inch target applies to the listed 302 configuration. |
| Rotating assembly | Check the crankshaft, connecting rods, pistons, clearances, and required machining as a complete combination. |
| Heads and fasteners | Verify the selected heads, head fasteners, main fasteners, and related dimensions for the exact block. |
| Cam and transmission interface | Confirm component fit and the transmission-side interface before committing to a build. |
| Purchase and build costs | Ask about current price, stock, freight, warranty terms, machining requirements, and total build cost. |
Buying and planning a build
- Choose the 302- or 351-based configuration based on the intended engine family and build dimensions.
- Get the exact SKU and current product information from BluePrint Engines, and confirm what is included with the bare block.
- Have an engine builder or machinist check the crank, rods, pistons, heads, fasteners, cam, transmission interface, and required clearances together.
- Confirm current price, availability, shipping or freight charges, warranty terms, and any machining work needed before ordering.
FAQ
What are the listed dimensions of BluePrint’s 302 bare block?
BluePrint’s product listing for SKU BPP12110342 specifies an 8.200-inch deck, a 4.125-inch bore, and ductile cast splayed main caps.
How much displacement is the 302 block intended to support?
BluePrint states that the listed block is engineered for stroker combinations up to 363 cubic inches. Confirm the bore, stroke, parts, and machining plan with an engine builder; that figure is not a blanket fitment guarantee.
Recommended Free Tools
Rank #3
- Product size: The product is 50mm long, 32mm wide, 23.5mm high, 4mm thread diameter, 20mm hole distance, Manual measurements, please allow slight errors.
- Compatibility: The motor terminal block is suitable for most motors, generators and similar equipment.
- Easy to install: Direct replacement without adjustment, perfect compatibility and high reliability.
- Product material: The product is specially designed with metal and plastic materials, with high service life and not easy to damage.
- Product list: Product include a total of 2pcs Motor Connection Block, which can completely meet your daily use needs and replacement.
Is there a 351 Windsor bare block?
FordMuscle reports a taller, approximately 9.5-inch-deck configuration for 351-based builds. The sources do not establish one universal displacement ceiling for it; the result depends on bore and stroke selection.
Are the strength claims independently tested?
The available research identifies manufacturer claims and trade reporting, not an independent test protocol or verified durability rating. Consider the reported design features as attributed claims rather than proven performance guarantees.
Rank #4
- Designed for Shipping Or Storage Of Complete Engines
- Suitable For Fork Lifts - Stackable To Save Space
- Put Your Engine In A Box Like The Pros Do !!!
- Keep Those Dent's Out Of Your Trailer
- Keep The Freight Companies Happy
How much does the 302 bare block cost?
BluePrint’s listing displayed $2,599 when it was crawled. Check the current listing for price and stock, and ask the seller about freight, warranty, and what is included.
Is this a complete engine?
No. It is a bare block for a custom build. Confirm exactly what the selected SKU includes and budget for compatible components, machine-shop work, assembly, and delivery.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
