69 LWB c10 tires wheels dropped spindles dropped coils

[FarmYard]

Having a hard time finding exactly what i am looking for. Maybe someone can shed some knowledge or threads that pertain to what i am looking for.

1969 LWB c10

i have 4-15x8 6 lug truck rally wheels. Would like to keep all rims the same 15x8. Wanting to do a disc brake/2.5 dropped spindle/ rear 5" coil drop

2.5 dropped spindles push the rim out 3/4"? what tires will work and not rub on 15x8 rim? Would like to keep all the tires the same size.

here is the brake kit i am thinking about if it helps any.

https://www.performanceonline.com/Di...r-5-and-6-Lug/

here is what it looks like now. Thanks