There's two things to consider. What is the installed height and what is the diameter of the spring pocket?
If the installed height is 1.75 then the springs xntrik specs out are right. If the installed height is 1.80 or a little higher then Comp number 26918 will give you the correct pressure or you could shim to get 1.75 and use the 26915's.
These two numbers are if the spring seat is stock diameter. If the spring seats have been enlarged to accept a 1 7/16 spring then CC# 26986 would be the right choice.
In any case the cam you chose is looking for 130# on the seat and about 290# over the nose.