rear end decision. please help

[cwags25]

I have a nice day driver 69 gmc that i am doing a frame off. It is my first build of this caliber and you guys have been a great helps so far so here goes another ? . It has a dana 44 on leafs. I am keeping the leafs, should i keep the rear? I exploded the differential doing a burnout, (the cause of the rebuild and need to completely rebuild it. I also need to change to 5 lugs to match the new front discs. Should i use the housing, installing new axels, limited slip, and gears, or just get another rear to build? It has a 383/700r4 combo. If i should keep it any ideas on the carrier options and axels. Thanks again.