Wayne due subframe- engine perches unequal! HELP?

[Z06vette]

Having problems setting the motor in - its bottoming out on the motor mounts before it will go low enough to line up the bolt holes. I noticed the perches are not the same length- one is 8" to center, the other 9". Is this a screwup or what? Seems like there is not enough room between the perches for the motor to fit. Should I cut the tube off & re-weld it at 8" to match the other side? Any input is appreciated. Here's some pics.
Scott