How to Fix a Stripped Head Bolt OnAllCylinders
There are several kits on the market for thread repair, but Ive used the HeliCoil kits in the past with good results. In the case of the smallblock Chevy, the head bolt is 7/16inch with 14 threads per inch. So this will require the HeliCoil kit PN55217. The kit comes with the unique tap, insert tool, and six thread inserts.