GF-EJ-CUMMINS-6BT Swap Block Mock-Up Engine Block, Cummins 5.9 6BT

Name: GF-EJ-CUMMINS-6BT Swap Block Mock-Up Engine Block, Cummins 5.9 6BT
Brand: G FORCE PERFORMANCE PRODUCTS
SKU: 472-GF-CUMMINS6B
Price: 334.99 USD
Availability: InStock

^$334⁹⁹

Ships on Sep 07, 2026

Lowest Price Guarantee

Dodge

Swap Block Mock-Up Engine Block

Cummins 5.9 6BT

Accurate & Rigid Representation of Actual Engine Block

Durable Steel Construction

Unique Tab-and-Slot Design

Resists Welding Heat

Includes Hardware

G Force Performance GF-EJ-CUMMINS-6BT Features:

Engine: Cummins 12V 6BT 5.9L
Years: 1989-1998
G Force patent-pending tab-and-slot version of the mock up block provides accurate mounting positions of engine accessories and bolt-ons.
Weighs only 33 lbs
This unique design is lightweight and comes disassembled for ease of shipping and storage.
Precision formed returns on all weight-bearing components and tight tolerance slots create a rigid and accurate representation of the Cummins 12V 6BT 5.9L engine block compared to bolt-together types.
One tool accomplishes accurate placement of a 12v 6BT Cummins engine into the chassis build of your choice.
Easily positioned by hand, the days of slinging an engine on a crane in and out of your build are over.
It's designed to bolt to your transmission while also permitting the attachment of oil pan, motor mounts, header, front timing cover, oil filter housing, and intake.
Save time and money and work more safely.
Durable steel construction resists heat from welding, so unlike foam blocks, custom motor mounts can be fabricated right on the block.
Comes with hardware for exhaust, motor mounts, bellhousing, oil pan, and timing cover.Â

This video shows how to assemble the LS version of our Swap Block Engine Mock Up Blocks. Assembly with G Force patent pending tab and slot system is the same for all of our Swap Blocks.

Ensure Accurate Placement of Your Engine and Accessories

G Force Performance Swap Block Mock-Up Engine Blocks are the ultimate solution for accurately positioning an engine into the chassis of your choice. Designed with precision-formed returns on all weight-bearing components and tight tolerance slots, it provides a rigid and exact representation of the engine block. This lightweight tool features a distinctive tab-and-slot design that ensures precise mounting positions for engine accessories and bolt-ons. It bolts directly to your transmission and allows for the attachment of the oil pan, motor mounts, headers, water pump, and intake, streamlining the entire assembly process. Engineered for efficiency and safety, the Engine Mock-Up Block saves you time and money while reducing the risk of errors or damage during installation.

Part TypeEngine Mock-Up Block

Product LineG Force Performance Swap Block Mock-Up Engine Blocks

BrandG FORCE PERFORMANCE PRODUCTS

Package Height4.0

Package Width18.0

Package Length24.0

Weight35.0 PG

Part CategoryPerformance Parts

Part FitmentSemi Universal

Vendor Part NumberGF-EJ-CUMMINS-6BT

Package Qty1

Package TypeEA