stock valve springs with new xe256h
#2
Melting Slicks
I'll let the experts answer this, but I don't think that cam's lift is too big to be a concerned about. You don't state anything else such as how many miles are on the existing springs. Springs do change in value as they fatigue. If there are more that 50k miles, I'd consider replacing them. If the heads have more 75k miles then a complete freshen up may be in order.