I've got a custom cam going in that I believe has lobes similar to the aggressive XFI lobes, as I was recommended about 150# seat spring pressure for this cam, and suggested Patriot Gold springs on 1.730". Is this ok to use with the stock lifters or is this much pressure going to cause issues?

 

I'm running the Patriot Xtreme springs and stock lifters without a problem. The Xtreme's seat pressure is 155# at 1.800.