354 or 392? Hemi? Questions?

Its not that big of as deal, not a one day job but still not that bad. For $600.00 you could resell easily if you change your mind. Check with Zigs here, he has one in his Dart. Small block motor mounts bolt to the block but the block is about 1" wider. You could adapt to match your K frame, I adapted a set of big block mounts for mine. PAW and Hot Heads has a good assortment of headers. 727 will bolt up with an adapter, I got mine from Tom Waters (very nice piece). As Dartman said, original transmission not worth using. I have a 360 dist. in mine, just had to cut the shaft to the cam and oil pump and renotch it. Good luck