Hood alignment woes stripped bolt in hood

After re installing the hood on my 70 swinger I have had issues trying to get the alignment correct. I got to the point where the passenger side looks very good but have been fighting the driver side. The alignment side to side looks good but I couldn't seem to get my height correct. I have been close but looked to be about 1/8" too high above the fender. After loosing and tightening the bolts 100 times I stripped the rear nut inside the hood. The way these hoods were put together it looks like my only option is to tap the nut inside the hood. Has anyone else had this problem? Any suggestions what what size tap should be used?
Also once I correct the nut issue what is the best way to adjust the height. The rubber bumper stop is not pushing the hood up. Thanks for any input
Mark