So I'm doing my budget cam swap (budget meaning I'm a cheap *** **** ).

Is it safe to run a set of used Aftermarket Hardened 7.4s? Not that I have a set yet but I might look into it.

So far I have XR265HR and a set of yellow LS6 springs.

 

As long as the length is correct and the ends are the right style it shouldnt be a problem. Their easy to change just make sure thier not bent.