The FiberFab Pinto and Classic Motor Carriages Chevette builder manuals on the “Download Manuals” page have a variety of chassis diagrams, but none that have measurements. It’s a good place to start. But you will have a lot of calculating to do.
Former Owner of a 1981 Classic Roadsters Ltd. Duchess (VW)
2005 Intermeccanica Roadster
If you own a TDr and are not in the Registry, please go to https://tdreplica.com/forums/topic/mg-td-replica-registry/ and register (you need to copy and paste the link)