I blew my motor in my 99 sonoma. I just picked up a motor out of a 97 jimmy blazer. 4.3 vortec. I get the motor set in and the old bell housing bolts don't fit?!?!? Wtf never ran into this before. Anyone know the bolt size. I have metric now m10x1.50 thread. Anyone know what the standard bolt size is?? THANKS! I would hate to pull it back out just to figure out the size. As you prob know it was a PITA to get in.