Edelbrock valve spring replacements

I run the 16904 trick flow springs on my eddies. They were specced by Dwayne Porter.
My cam is a Howards solid lifter. 260/264@50, 565/565 lift with 1.5 rockers.
Cam makes excellent power and would be better actually on a 408/416 than it is on my 360
Its on a 106, in at 102 per the instructions.
Also went with the Howards EDM lifters which have an oiling hole on the face. Very worthwhile insurance.
May end up using this cam on my 418 with new trickflows build. Probably buy 1.6 intake rockers if i do.