What will I need 6 to a 340 on a 66 Dart?

Center link is the tough one.
-Schumacher makes (or made) motor mounts.
-Aftermarket radiators are available.
-Aftermarket pedal and throttle cable if you’re inclined or can’t find the factory V8 one.
-same for t-bars

the good news is the k-frame is the same for both slant and small block.