Driveshaft banging the saftey loop?

[Coupe50h]

only on a hard launch on slicks, say a low 1.7 60', It hit, and shredded off some aluminum of the d/s on mountingbolt on the loop

Does not hit during regular hard driving? It is the frpp aluminum d/s, I installed it a couple inches behind the tailshaft, and i used the lakewood loop, just for mustangs, I also used the spacers that come with it to make it fit the contour of the floor, the only way it would fit was a little close on the passenger side, but i went ahead with it.
I checked my tranny, and crossmember mounts, everything is tight?

Now my motor mounts are pretty bad, And im going to replace with some vert mounts, I doubt that will solve the problem completely being how hard it hit's now, I really dont want to destroy a 300$ d/s, seems a device made to protect it, is now destroying it.
I dont want to have to re-drill mounting holes, but looks like i might have too, what do you guys think?
thnx.