[flatjack9]

As Ronnie said, you should be using the bottom groove. I'm thinking the spring might bind at the top of the lift if you use that groove. This is another thing you need to check. If your spring is installed at 1.675, you need to subtract the lift at the cam from that number and check the spring to make sure it doesn't bind. If the lift is .300, you need to check it at 1.375. Also check the pressure at that height.