Need some help with swap PLEASE!!

[dirtboy488]

I have a 5 lug crossmember out of an 81 1/2 ton 2wd Chevy to put in my '70 2wd. I was wondering if there are 6 lug rotors available anywhere. The reason why I am wondering is because I got 5 lug rear axles out of a '77 gm van 12 bolt and they are longer thn my 12 bolt 6 lug axles. So if anyone knows what year and model 12 bolt rear end that I can pull 5 lug axles out of that will fit my '70 12 bolt, other wise I am going to leave the rear 6 lug and try to change the crossmember to 6 lug.

Thanks in advance for helping me with my mess.....Terry