5.9 stroker build

Still waiting on the machinist to finish the block, in the meantime I'm digging into the cam specs on the Hughes HR cam.
Hughes requires that their spring p/n 1129 be used with these cams. Comparing these specs with the installed springs on the TF heads reveals some discrepancies.
Per the cam card, Hughes requires 145#@ 1.800" on the seat. TF's specs are 120#@ 1.900". Hughes requires 345# @ .550 lift. Conversely, TF calculates to 335#@ .550. TF's spring rate is 390 lbs/in. So, (390 x .550)+120=335.
Taking it a step further, the cam's intake lift with 1.6 rockers is .576". Hughes' spring rate is 391 lbs/in. So at max lift, Hughes' spring rate is (391 x .576)+145= 370#. TF is (390 x .576)+120= 345#. Being a novice engine builder, spring rates vs. cam profiles wasn't something I was deeply aware of. Am I looking at this correctly?
If the springs and cam profile are incompatible, then I either swap the cam or the springs. Changing out the cam would be the path of least resistance. I like the Hughes cam profiles; I have their hyd FT grind in my 440 and it runs strong. But it seems changing one cam is easier than 16 springs. And would I also have to change the locks and retainers?