C20 Front end rebuild kit help

[c20olive]

Hey I've got a few questions..... I'm looking into a front end rebuild kit but I'm not sure what kits are the best I've looked online at early classic,performance online,speedway motors...I won't a good quality kit an good bang for the buck I've also noticed that none of these kits have cross shafts? But That's all the kits I've found online also I plan on getting 6 inch drop springs for the rear an possibly block it up will I need to do any crossmember modifications,shock relocation....I also plan on getting 4inch drop springs for the front and will shock relocations be need there an thanks for your help before hand