GT40 irons valve spring question.

Edit: My fault...i searched but nothing popped up and I coulda just scrolled down. I'd delete if I could figure out how.

Alright guys I've been outta all this mustang stuff for quite a while since I've been broke. What I'm trying to do is throw together a quick little budget buildup for my 93 coupe. I've picked up a set of GT40 iron heads but I dont really know a whole lot about valve springs and what not so I come to you guys( i searched too). I know I need to replace the springs so i can run my E303 cam...I dont wanna bust any valves, float, or bind but I honestly have no clue what to get. Can someone help me out..I'm eyeing VALVE SPRING UPGRADE KIT, SMALL BLOCK FORD WITH OE STYLE CAST IRON HEADS MUSTANG
I'm looking to you guys to save me before I buy the wrong springs..any help/ideas/call me a tard would be great. Thanks

P.S. budget build list: if you see any flaws or weaknesses lemme know.
GT40 irons not "P"..flashing removed..no real port work
1.6 rockers
Cobra intake...same as above
E303...i know i could go otherwise but emissions
65mm tbody
24lb injectors
C&L 76mm mass air.