First of all its a leveled 08 F350 CCSB.
Heres what I'm thinking....
1. Stock front springs with a 250 block in the rear and 305/55s.
or
2. 5.4 (4800#) springs up front and no block in the rear and 305/50s.
**Both of these are going to be with 305/50s or 305/55s on...