These frame boxing sets are designed to reinforce your failure prone factory frame.  This kit will work with the stock motor mounts and front cross members. The standard kit boxes the frame rails in from the steering box to just past the transmission crossmember, while the extended length kit does the entire frame. We recommend doing the entire frame to allow the frame equal strength and flex.  Fabrication and welding are required!  This kit works with all the factory mounts and cross members. Say goodbye to frame issues and cracks, it also comes with machined DOM sleeves and grade 8 hardware for the steering box to reinforce that trouble prone area.  Made in the USA!