73 340 motor worth

I have seen 340's with the steel crank go for $800 that needed rebuilding. The 73 has a cast crank so deduct $200 and go from there. Sounds like a pretty good deal. 340's are higher priced than 360's. You can get a 360 cheaper, but what do you want?
I have a 340 for my 69 Dart and have over $3500 in it and am happy with my selection, but a nice priced BB would open my mind.