[lolife99]

You can't run a drop spindle, and a 15x8 wheel with any more than 4" BS up front.
The greater BS will drive the rim right into the lower a-arm.
(even with 4" BS you have to trim the lower a-arm for clearance)

It is possible to do with 17" and larger wheels.
(Don't know about 16" wheels, because I've never tried it).