The adaptor plates were made for Castiron Cowboys, spacer for ford 4x4 that has 400 cummins engine and thirteen speed road rangers transmission with rear differentail of Peterbuilt truck 20" Tires. Speical shaft were built for the truck pix soon to come.                                                                                                                                These Driveshafts were built for Bill Brack's Teen Age Boy's for Dirt Track Racing around Colorado and Wyoming Tracks. They have extra Long 350 Transmission Yoke and 2" X .095 Tubing very Popular in this area of Racing.