So, I will disagree. A 400 HO car missing it's original drivetrain to me is still a 400 HO car. Just worth significantly less than one with it's correct/original drivetrain. Using as correct as possible parts would redeem some of it's value, but it would never be worth as much as an original 400 HO with all its born with equipment. Putting a Chebby LS1 in it doesn't turn it into a Camaro does it?
1968 400 Coupe, verdoro green, black vinyl top, auto 1969 GTO Judge coupe, Carousel Red, manual 1971 Trans Am, cameo white, auto 1970 Buick Skylark Custom Convertible 350-4(driver), Fire Red, white top, auto 1972 Buick GS Stage 1, Royal Blue, black vinyl top, auto