A question of originality

I'm subscribed. I have an original, numbers matching 70 Swinger 340. I rebuilt the original, numbers matching 340, with all the correct parts, including the carb, distributor, and even the AC compressor. I shrink wrapped it, and put it in the corner. I'm building a 408 with modern components, including a Sniper EFI. I scored an A body 8 3/4 rear years ago, and i plan on taking my # matching rear out and rebuilding my replacement with a SG and rear disc brakes. I want modern performance with all the modern safety equipment, and keeping my # matching parts, with the build sheet, put away incase whoever inherits the car can restore it to the build sheet. The brake system is a big part of this, especially with the SBP pattern. I'm watching this one closely.