Guess I need to clarify since I am the "misinformed tech" person. The area I refer to is the are supporting the sleeve, or the water jacket area, I said nothing about the sleeve thickness. I have had the unfortunate instance of having dealt with two blocks with damaged sleeves. One KB and one Indy. The water jacket area on the Indy is extremely thin, at least on my older Indy block. So thin in fact we could not get it welded to repair the area. I have a pic somewhere but in my block it was approx. .020" thick. Maybe I got a bad block, maybe its better now but it was so thin it could not be repaired by welding it back up. I lost a sleeve on a KB block and it also went through the water jacket area that supports the sleeve. It was repairable and that area while not exactly thick was .090" and we were able to weld it back up and use the block again.

So I will continue to share what I have personally found using these blocks. Instead of spreading misinformation on the net....