I can't say about the poly, but I know for sure that the late model 318 bolts in a 55 Desoto that had a 291 Hemi in it.

One was a direct bolt on, the other needed one tab extended for the 94 318 Magnum I used.
I had mocked it up with 67 318 and it was a bolt in with no mods. They had eliminated one of the bosses on the 94 block so use a different boss hole and add a place to get the bottom bolt attached to the block (r/s if I remember correctly).





I'm pretty sure that the poly engine mount bosses (ears) on the block are the same.

If I can give you anymore details about the swap pm me and I'll tell you what I can.


Kayse and I love the way your car looks, checked it out again at the Nats over the weekend.
The pics in your rear window package tray have inspired her to do her own version of strong/great women in history in her 55 Desoto.

Now I just need to get the car done.