Street/Strip suspension?

[btstrohfus]

I have a 71 c10 with a stock suspension.I reciently purchased a 12bold from a friend who drag races and he set me up with a great rearend. i want to change the drums to disc brakes and lower the entire truck 4in or so. but anyway im afraid its going to lack the traction i need to hook the truck up with a 600hp 406 and 4.88 gears. can anyone give me something to go by to make a setup to hep with this problem, or an inexpensive solution to this problem. any pictures would help if you have have them of your setup.. thanks for looking and helping.