If you talking about intake manifold gaskets, isn't that a myth that has been disproven long ago? They were failing with green coolant just as much.
Even though LIM may have failed with green coolant, the sludge is unique to dexcool and didn't happen with green. GM eventually switched to a pressurized coolant tank. For the N-body, I think that happened in 99 when the next gen came out.
At the very minimum, don't use Dexcool unless your car has a pressurized coolant reservoir.