'89 360 LA valve spring/cam confusion

The set I took in yesterday were not useable so will just go the "easy" route & get some reman heads from the local parts house. This way no worries about whthere things will fit & will still provide the power I want. Also plan to budget in a 8 3/4 rear end to better handle the torque of the 360. Have a line on a complete setup for $800.