Art Morrison motor mounts

[snappytravis]

I was working on mock up of ls3 and t56 in 69 camaro with morrison gmax subframe, for some reason when I set the engine in the frame the lower edge of the motor mounts hit the frame before the holes line up, I can get one side lined up with the bolt through but not the other, the paperwork says tri5ls1, I am wondering if this is a different motor mount for another chassis or if they are all the same, I could possibly trim off aprox 1/4" on each side but thought I would ask for advice before I do anything and it's to late, any thoughts?