Valve Cover sealing problem with a stripped out bolt hole

I the widest part of that hole was .302 so luckily I'm able to put a 1/4-20 time sert in it. I ordered the 1/4-20 master kit and 10 .500 length inserts. I'll thread a stud in with some RTV and be good to go.

Tomorrow I'll re-work the lip on the valve cover and make sure that they're good and flat and so that when the bolts are torqued down the lip will sit flush. They've already been previously trimmed to fit over the intake runners.