408 hyd roller, too much spring pressure?

Here's a similar cam to mine by Hughes: https://www.hughesengines.com/Index...&level2=SHlkcmF1bGljIFJvbGxlcg==&partid=30765

They recommend 145lb on the seat and 308lb rate – which is also much higher seat pressure (and a much lower spring rate) than Crane recommends. The PAC 1218X springs I first used were based around similar figures, but those springs didn't work, so I had to step it up. Sometimes in the real world things don't work out how you expect. I note that the above spring pressures were recommend for 1.5-1.6 rockers. If you saw how meaty the the T&Ds are, you would understand why they need a bit of spring to control. If the question is why am I using those rockers in the first place, then it's because I got them for a good price and wanted to see what they would do. I was also considering stepping up to a solid roller at the time.