ok so i was wondering if the rear end and k member from a 74 valaint would fit on a 71 duster. the duster is a slant six and the valiant is a v8. also would anything else fit? like the front end?
The k member and the rear will definitely fit.
In fact, it should be bbp front and rear and that's a great upgrade to your Duster.
You are planning to go with the small block instead of the slant six right?