You may want to check out the FAQ sticky post at the top of the forum.
A forum member "Oscar Will" has a 35 ford with a LS1 and made this post in the FAQ: "You people with old car hybrids and straight frame rails can use the Corvette cast aluminum motor mount brackets with the stock oil-filled mount cushions. The cost is not ridiculous and the set-up works very well."
Also, S&P http://www.hotrodlane.cc/
has a project section listing a '39.
Hope this helps.