Indy heads rocker options 360-1
big solid roller 645 lift and 250 seat pressure, one is a mates exactly the same and similar lift spring pressure. I have checked valve clearance at 10 before and after and there is heaps, i didn't measure as it was like 6mm. I pushed down the valve at that point with a lever. oh and they`are not all from the same spot or cylinder. these are the springs
http://www.summitracing.com/parts/tfs-16943-16/application