Are you a purist?

All I really want is disc brakes and overdrive. Trying to eek out good power and mileage from the stock powerplant is one of the "fun" challenges of old cars, IMO. There's a little bit of a letdown if I see a late model fuel-injected drivetrain in an old Mopar or classic Mustang etc.....UNLESS.....it's a weird car like a Jaguar, then I'm all for putting in a modern complete drivetrain, because their original engines are a bit ridiculous.

But, strangely enough.....I DON'T mind seeing a nice carbureted 408 or something similar, or a W2-headed motor.