Rear end info

[CUSTOM_1O]

so i have a 6 lug drum brake setup on my truck and i know i want to convert to 5 lug disc breaks im going to buy the kit to convert to disc and 5 lug for the front but i was wondering what you guys thought for the rear if i should do the same or just pull the rear end out and replace with a rear end thats already 5 lug or possible 5 lug with disc already if so what kind of rear ends are compatable with a 69 c10 half ton long bed


thanks