I have a 75 Dart Sport that was originally a slant six car. I used Schumacher slant six to B/RB conversion mounts to put a low deck big block in it. Was run that way for a few years. Two years ago I put a 360 small block in with Schumacher slant six to small block conversion mounts. Both conversion mount kits used the same k-frame modification on driver side, so the small block went right in since I already previously modified that k-frame.