I’m in the process of making some WC mounts as we speak. Would you use poly or rubber bushes? Rather than reinvent the wheel, I’m modifying these https://www.summitracing.com/parts/TRD-4513
i wasn’t hopeful they'd help because I’ve always had the mounts chained fairly tight. Hopefully I’m wrong.
COT last year beat up the mounts (I use 164 mounts) to the extent one side rubber completely separated from the metal, but surprisingly P2P left them still intact, albeit stretched so far laterally that the opposing studs were about 8cm offset. The gearbox mount had let go, which I think must have contributed.
I’ve got an engine steady bar mounted between the top of the block to the inner guard which has probably helped, but not enough.