Recently in another thread, JWalker mentioned that the stamped rocker systems leave you losing a bit of valve lift. I, being the El Cheapo that I am, tried to use one of these systems on my 425 project. At first I thought the low valve lift that I was measuring was due to the fact that I needed a different length attachment for my dial indicator to line it up properly with the valve stem. Well, now I have said attachment and the valve lift is still pitifully low! About .100" low. That's way too much for my liking so I'm returning the rockers and going for the cast system instead. It's more money, but nobody steals my lift and gets away with it! Just thought I'd let anyone out there considering using these rockers know what's up with them. They are advertised as 1.7:1 ratio but measure in at more like 1.45:1. Now I just hope I still have the right piston to valve clearance with the increase in lift.