Big Joe: I forgot about that other car show factor - the fun of sitting in a chair behind your car having to listen to arm chair "experts" pick it apart. I hate that.
Yellowbird: Your point about modifications to the numbers matching parts is right on. My orginal 400 engine is sitting in a condition that would equate to it's greatest "value". Worn but unmachined. One of the things that pushed me down the 455 path was the thought of how much machining would have to be done to the virgin 670 heads so the motor would run on todays gas.
But Jim is right - back to the original question. If you like the idea of someday making money off your car, or enjoy the idea of Concours judging, then keeping the car original and numbers matching is essential.
And many thanks for the vote Bjorn.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI