Originality is not an issue..My truck is an in process restoration with intention of using it when I have a chore for a 1 ton mason's dump truck.....This transmission X member is factory riveted in, so it will require some effort for someone to remove it from a doner vehicle..probably why nobody is chomping at the bit to sell me one... The frame & undercarriage of this truck has no rust, however the X member has rust holes that I can't explain, other than dirt getting packed in there acting as a sponge for 50 years...c20 & c30 share a lot of mechanical/suspension parts I just wanted a confirmed answer if the transmission X members are the same.....Thanks for your comeback...will keep it in mind.....