raising the engine on the motor plate or mounts is the fix.
Using Moroso #62515 solid mounts with a Moroso pan #21047 clears the stock/unmodified
crossmember by .060+
shimming the engine up another 1/8"(.125) should gain you the additional clearance to easily fit a diaper.
BTW, just recieved my DRE custom fit diaper and it's well made and thin.