This past weekend I stripped one of the threads that hold the fuel bowl on my Holley Carb
On the Holley web page, holley shows a repair kit using Helli Coil iserts. While the Helli Coil inserts will work, to me it isn't the right way to repaiar the threads.
After using a different insert on my Lightning to repair damaged spark plug threads I knew there was a much better product. So if you ever strip the threads, here a better insert for you to use to repair the threads for the fuel bowl screws on a Holley carb.
They are called Time Serts, and instead of being a coil spring type of insert, they are a solid insert that holds much better, and when installed the right way do not come out like Heli Coils can.
Here is a link to there web page
The web page will tell you all about them, has directions on how to install them, and even has videos showing the install
The part number for the installation tool is 0124
And the inserts you want are a thread pitch of 12-24 .300 inches long, and part number 01241
I just did the repair on my Holley, and it went perfect.
When I talked to the tech he wasn't sure which length insert to use, as it goes into a bling hole. He thought the .370 length insert would work, but I wasn't sure so I also had them send me some of the shorter inserts. I might have been able to get the longer ones to work, if I had drilled 1 mm further into the carb, but I was afraid to drill too deep into the carb.
So even with the shorter insert the threads are now carbon steel rather than soft pot metal, and I am sure it will hold great even if I remove the fuel bowl hundreds of times. After all the Helli Coil inserts that Holley sells are only .320 inches long, and these are a lot stronger, and grip into the carb a lot better.