[MrMagoo]

Nice work, H20man. That explains a lot. I didn't know they called them "slip on", so I didn't find your post when I did my initial search. Nice to know I am not the only one who has issues with these. I think I have been lucky, mine are a real tight fit and I didn't notice that they leak, but maybe they do! I definitely agree that this would be better. Did you get the flanges from summit or jegs?

BTW the spreader I made did work, after switching to a longer spreader bolt I managed to get one header off, now working on the other one. This would save me ever having to do that again, and might be a leak stopper too.