You will need the pickup for that pan as well and also will have to plug off the DOD relief.After reading a ton of other build threads this is what I ordered.
CTSV pan
Spohn frame mounts
F body LS engine side mounts
G-force crossmember for 4l60e
Depends on if you plan on using AC, want to run the stock truck AC pump, etc.
Why F-body mounts? Dirty Dingo, All Star Performance, ICT Billet and many others make a mount that allows you to move the engine forward and back as needed. And they work with the factory clam shells as well.