This recently came up on one of the FB groups for these cars. I left the group after the alarming amount of people answering that, they used the same exact mount as the 318 with no difference.
They’re different mounts, the 360 mounts are really hard to find, you almost always get 318 mounts when you order something listed as a 360 mount.
Shim your DS 318 mount with some washers and a longer bolt and it will work fine in the 360.
…makes you wonder how many people are driving these cars around with a crooked engine. I already had a guy swear it was the only way to do his 340 swap. Again on FB.