Its the closed minded fool to think 1960s tech can't ever be improved upon.

XV had plenty of testing and documentation from their 4 post rig showing that "stock" unibody needs plenty of help to bring it up modern standards in terms of rigidity. Torque boxes, Frame connectors, Radiator core support, Fender Braces, Cowl braces ect all proven effective time and again.

Even brand new, our cars had beefed chassis with torque boxes and double Rocker rails. DC from DAY 1 stressed the need for Frame connectors. Even DC Kit cars had you stiffen up the stock Rocker rail even though it had a Full cage.

Considering ~$10K base price isn't far off from what it costs for a pile of parts of the currently available, individual "Front" and "Rear" Suspension kits.

Not sure to what extent this means "This full chassis is designed to bolt under your Mopar uni-body with minimum alterations to the floor while increasing the rigidity and strength"