FLM Hybrids and GM G3 Race Suspension

Was wondering if anyone's done this already?? The lower arms (at least on the rear) fit with no prob. Its the upper arm that going to be trouble. The flm hybrid has 4 alum bosses for the upper mount and the GM upper arm has 3, but they are all fairly small. No matter how the arm is placed, there a ton of room between the alum bosses letting the arm move back and forth.

I'm not planning on using the G3 towers which leaves me with the spacers. Maybe I can mod them to fit so take up the room on the hinge pin??

Didn't see this PIA coming, lol!!