body expert needed !!!!

i need to know when an s/c body is irrepairable. i have 2 89 s/c's one with heavy front end damage, one with rear damage. is it possible to remove sub-frames and build one straight car ? are there certain points or measurements that can be taken to verify body damage, that isn't easily seen? i appreciate any info. thanks in advance

It can and has been done. The SWB Tbirds are a testament to it.