Need an 8 3/4 for my 69 Dart 413/727, help?

Wisconsin and Minnesota, derby guys throw the 8.75s away for there custom built Dana 60s and 14bolts so i just pick up them ""junk 8 3/4's" all the c body cars every now and then you get lucky and one has a sure grip. Mostly all have 3.23 or 2.76 gears but ebay has cheap sets of 3.55 for $100. I have a full time farmand work full time on top 3 young kids, stay at home wife so my car hobby is strict low budget i make it work and most people would never know looking at my cars its all low budget