what hp can a 742 case 8 3/4 handle

It may hold for a bit,just be prepared to upgrade in the future.I ran a narrowed 8 3/4 .489 case with 4.30 spool,Strange axels.I had twisted splines,replaced axel then started to bend the housing(no brace.Doh!)After the first twisted axel I ordered my Dana60,CM driveshaft with 1350 u-joints.Now going transbrake,so we,ll see how she does.Good luck,just don,t be surprised if breakage occurs.