if you can ..the way i would fix it is with a pipe plug drill and tap it for a pipe plug put in with some JB weld on the plug screw it in and let setup. then grind the plug head if needed then do a short fill with block rock or weld it then fill . try to use a smaller pipe plug to fix the hole ....this is nice the form is screwed up should i try to jiggle the handle it still running