this is simple fix,, been doiong this to my 302 gmc,s for 25 years first with cover removed drill &tap 2 stud holes in main cap to 3/8 thread,eather coars or fine thread.... next drill cover to 13/32,,,, you then can use earther 2 short bolts or as i do ,2 short studs installed into main cap this way you remove cover without removing pan.....