At my last visit to the boneyard, there was unfortunately a '76 6.9 sitting amongst the mix. Since I own a '79 6.9 which I don't ever plan on selling, what parts should I "pillage" from the carcass at the junkyard to keep as extras for the future. Are there some components in particular which are extremely costly or near impossible to replace? In a perfect world, I'd just take that car home with me and keep it on the property, but that is not going to happen.