420A Valve covers stripped?

[2g420aeclipse]

So I noticed some of the bolts won't torque down so I retap it but it looks like is not enough. I heard you can use heli coil but i do not know the dimensions. I do not know if I'm correct do I have to get kit that is m8 * 1.25inch or am I wrong. I own a gs not a gst yup I know why a gs well where I from is hard to get gst or gsx

 

[vaughn scherf]

What I actually didn't on my 420a was run a longer bolt through it and a nut and washer in the other side but yes a helicoil will work just bring one of your bolts t a parts store and they can match you with a helicoil that will fit and you drill ad retap hole to what the helicoil package says