I'm going to be pulling my L98 aluminum heads to replace some cheap leaking headers as well as to repair some stripped threads for both the intake manifold bolts and exhaust manifold bolts on the heads. I'd like to go with Keenserts but would like to know if this is something I can do myself. If not, any idea as to how much a shop would charge me? The exhaust threads don't concern me as much as the intake manifold threads. I want to make sure I the Keenserts are installed at the correct angle.

FYI, I stripped the threads before I knew that these heads had different bolt entrance angles than the original heads. Any thoughts, comments appreciated. Hope this was clear. Thanks.

 

You can do it yourself, the exact angle isn't that critical.