FWIW I have messed around with multiple Xram setups using dual 3/4" pop offs over the years (30 or so years), most were Hemi's and small blocks. To date I've never had an intake crack when it "sneezed", the valves did their thing. Having said that, a larger opening with a plate, or more valves, wouldn't hurt any, the more pressure relief and the faster, the better.