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Ok, you guys are right. I probably would have put the nut on there and looked at it for 20 min, then jumped in my car to find a helicoil kit.
Plus engine is upside down on stand with only the 4 bottom bolts holding the timing cover on. I can have it off in less than a minute.



If ythe engine is still on the stand fixing it the right way makes sense , if it were in the car and you needed to get it fixed for the morning commute then the longer bolt and nut is the way to go .

I also helicoil alum threads I know will come apart more than once in a lifetime. I have done a few transmission jobs that have had the pan, pump and valvebody holes all helicoiled while I have it on the bench.