rx1 warrior

Working on a rx1 warrior. Head was machined to correct warp. Is the factory headgasket sufficient, do I need to stack gaskets or is there a special thicker gasket that's normally used? Also, do I need to replace the head studs on this as well? I apologize if these questions have already been...

Just at the end of this season I broke the windshield on my 05 Warrior and come to find out it is discontinued. I'm trying to keep it all Original.... Any suggestions where I can find the DRMK Windshield for this sled p/n is 8FV-K7210-00-00? Thx