Fat man fabrications has a large assortment of mounts that will probably fit your needs. You will also need a rear transmission mount fabricated. When you install the 360 you will need to remove the hump on passenger side of firewall in order for the engine to clear as the heads are offset. The original steering on this car is preety good except in tight places. I have a 39 d11 with 318 auto 83/4 rear. Like to hear more about yours.
You should be able to locate Fat Man on the internet.