Mock Up Block - Gen V LT

The G Force Crossmembers Mock Up Block – Gen V LT is a precision-engineered fabrication and alignment tool designed for builders, mechanics, and engine swap specialists working with fifth-generation Chevrolet LS platforms. This mock-up block serves as a dimensional reference, allowing you to validate crossmember clearances, header routing, oil pan fitment, and overall engine bay packaging before committing to final welding or modification. It is particularly useful for those planning a classic-to-modern conversion or a standalone engine transplant.

Constructed to provide a dimensional reference of the Gen V LT block envelope, this mock-up captures critical centerline measurements, accessory boss locations, and mounting points that influence crossmember design and engine placement geometry. Weighing 28.73 pounds and measuring 18.5 × 4.5 × 24 inches, the block is substantial enough to provide accurate spatial reference without the full weight and complexity of a complete engine assembly. This allows you to test fit and verify clearances in your frame or chassis while keeping your actual engine on the stand.

The G Force Crossmembers Mock Up Block is ideal for hot rodders, restomod builders, professional fabricators, and engine swap specialists. Its design helps eliminate costly fabrication errors and ensures first-time fitment accuracy during the planning phase. By using this tool, builders can confidently develop modifications that will fit their finished engine setup.