No spesific experience, but requires likely custom pipes if you want to try 3''. I had already fitment issues with Weldspeed intake and Wagner tuning hard lines that are 60mm, so pipe after IC needed to be modified. As you're building with nice bits maybe an educated shop could help you out getting the intake sorted.
So don't think 3'' is easy fit. Have you consulted Lamspeed on the topic? I'm sure they've been there as building that monster GR.