1974 duster factory big block 400 car??????
That would be super cool to have.
I'm sure it has "E44" on the tag, though.
I believe I'd go ahead and put a 400 in it, just as I would have imagined the factory would have done it.
Then I'd just take it to shows, and let it sit with the hood up.
No banners, displays, nothing, just a stock looking big block Duster with a "correct" VIN.