What year model truck are you dealing with? 1963 and later use the same rubber for both engines, if memory serves. I think that the stands for the mounts are riveted to the cross member. I suppose you could find a 6 cylinder truck and cut the mounts off the cross member or find one of your buddies who went to a V-8 from a 6 and get his old mounts. Back to 1955 second, you have to make your own stands. 1955 first back, contact Tom Langdon for his kit.
good luck and best wishes,
Les
