Our patent-pending tab-and-slot version of the mock up block provides accurate mounting positions of engine accessories and bolt-ons.

• Precision formed returns on all weight-bearing components and tight tolerance slots create a rigid and accurate representation of the GM Mark IV, V, and VI BBC engine block compared to bolt-together types.
• Easily positioned by hand, the days of slinging an engine on a crane in and out of your build are over.
• One tool accomplishes accurate placement of a Big Block Chevy engine into the chassis build of your choice.
• It’s designed to bolt to your transmission while also permitting the attachment of oil pan, motor mounts, headers, water pump 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.
• This unique design is lightweight and comes disassembled for ease of shipping and storage.
• Comes with hardware for exhaust, motor mounts, bellhousing, oil pan, and water pump.

Download Assembly Instructions here.

Our video and written assembly instructions describe how to assemble the LS version of our Swap Block Engine Mock Up Block. Assembly with our patent-pending tab and slot system is the same for our engine and transmission Swap Blocks.