Eight and three-quarter rear end driveshaft issue

Hey guys, got the eight and three quarter-inch put in and got the correct length driveshaft to my 904. I went to hook it up at the third member and realized the joint on the end of the drive shaft is too short side to side. When I put it into the third member there’s about a half inch space on either side. Is there a special joint that goes in this one? Something that goes from an a body drive shaft to a third member out of a B body?