My exact route. If a stroker dosen't come to me so easy in the future, I really do not think a rebuild of it is out of the question. The 400 has expensive (By compare) pistons over some of the other big blocks, but at least they make'em new and in cast, Hyper-U and forged, dished, domed and flat top. Unlike a RB 383, 350/361 B engines.
With the light body and lightening it up further, I don't see much of a problem with having a high to mid 11 second car a hard thing to do. It can even still be a easy streeable build.
There was a thread going on about A body/Duster weight. Some fellas with big blocks in there Duster were reporting 3200 and down. The engine was treated to all the aluminum parts it could get bolted on to it.
Further weight reductions would come from fiberglass body panels and bumpers. Heck, deleating the steel behind the chrome bumpers has gota be a 100 lbs on the early Dusters never mind the big ones of the later years.
If your good, a sub 3000 lbs. big block Duster is doable. :rock: