You can also visually compare the tap to the bolt to see if they match ... Most auto parts stores will have a thread insert kit in stock and I used the Autozone brand kit. It should come with ...

Once lined up, we used a dead-blow hammer to tap it over the factory framerail. This kit is a bolt-on deal, but we don't see any reason why you couldn't weld the brackets in place if you so desired.

a through-hole tap, an installation tool, and a -inch drill bit. The kit's supplied -20 inserts are 0.750-inch in length (1 times the bolt diameter), which is usually considered sufficient ...