66 Dart questions

The 66 K-member is the same for both /6 and V8 engines. The only thing you'll need to look for is the droped center link in the steering system, since some, but apparently not all, /6's came with the drop. Any of the period V8 motor mounts will work, you just need a spacer on the driver's side motor mount. The other thing that's crucial for the switch is the exhaust manifolds, since they're kind of a different setup with a huge curve in the driver's side manifold to clear the steering gear and starter. There are also headers available for this setup. $$$$. :) You'll also need all the V8 transmission setup, wether you go manual or auto.

The 73 + disk brake setup will work if you change the upper control arms. You'll also need the spindles, rotors, master cylinder, and proportioning valve. The 8.25" rear end from another A body is virtually a drop in, just make sure you get the complete brake setup with it, from the backing plates out. Also get the spring mounting pads since the axle tubes are bigger on the 8.25" than on the current 7.25".

Have a look at my CarDomain site and you can get a look at the center link I mentioned, and also the car type oil pan you require, as well as the left side motor mount. Good luck.