Dammit. Lol I was eying up the Mancini rocker setup. That tool was listed as having one of the larger measurement lengths as a quick Amazon search netted smaller max lengths. Not sure it shipped yet and could cancel that tool unless you think it will work with that setup in the link. Thanks for your input
Flat out, I don’t know enough about big blocks to provide enough assistance other than to know cup vs ball and that they have a longer distance from lifter to rocker than small blocks.
Mancini shows a set of pushrods at just over 9”, which would mean the length checker you ordered won’t work. But, you should really check with Mancini or someone on here might have more experience to better guide you.