Yes but you also have a high lift cam IIRC (134) which is a lot harder on valve springs. The cam I will be using is a low lift - long duration cam which is easy on the springs, because the cam profile rises a lot slower.
"Stiffer" doesn't always mean better.

My cam and spring choice is actually a result of reading about these on the famous Des Hammill's book.
+ I'm not after big bhp, but I want a much more lively engine.

I'm planning on measuring the spring tensions to make sure they are good for the amount of lift the cam has.