My experience on the LIM gaskets says your outlook of that should be changed. Loosing a ps rack is quick simple and relatively cheap to fix. Usually there's no detrimental problems that can arise if you let it go.

LIM gaskets bowing and coming apart can dump coolant into the engine and destroy it. Dex BTW was never the cause of the gaskets breaking down..so can the theory you are good because you don't have it.