Right on both counts. Or, since changing out the valve springs is a pretty easy job, you could also look at the BTR springs because they’re good to .560I just thought to look for an emailed receipt.
28-12713265-16 - GM High Performance LS .550"
Lift Springs, Set of 16
So I'd have to go with the low lift if I'm not confused. It sounds like I'd still get a large bump in low end torque vs the LS9 cam I put in.