1973 duster radiator

Sorry I didn't get back sooner. I have a running, driving 73 Duster /6 auto that has the radiator in it still. I also have a radiator out of a 70 R.R. I had & was going to see if it bolted up, just haven't had the chance to do it yet.
I don't know the difference between a slant 6 and a 340 radiator.
Not sure if it works or not.. That's cool whenever you find the time thanks