read thru all 2000+ posts in this thread and you will have a very good idea of what everyone here thinks.
my personal thought is there is no good donor car clip. it's a lot more work and time, plus you still have a 30 yr old car front end to rebuild when you get done. by the time you add everything up not much money save either.
look at the mustang II cross members available on the market. my 58 has a fatman must II xmember and i am very pleased with it.