Engine mount brackets for 318 in '70 A body

Hello from France,

I have a 1970 Plymouth Duster with a 318 engine. But originally the car was imported to France in 1970 with a slant 6. The previous owner tinkered with some engine mounts, and I want to do this again properly.

First question: I heard that on A-body until 1972, the engine cradle was the same whether it was a slant 6 or a v8. Is it correct ?

Otherwise, I also saw that apparently the engine mounts are different between a 293/318 and a 340/360. Also true?

I got confirmation from the previous owner that he just removed the slant 6 and put the 318 in it. So I have well the original cradle.

In this case, can you tell me where I can find the brackets to put my 318 correctly.

Thank you !