67mustang302

Rollers don't need to be broken in, so spring pressure isn't a concern in that regard.

I'm not a huge fan of OTS cams anyway, you can get a good retro fit profile if you go custom, assuming you have the money (300ish for the cam, then you still need lifters, pushrods and springs).

barnett468

Rollers should also be broken in but their break in is not as sensitive as it is for a non roller cam.