HELP 10 inch sbp rear drums or modifications to front drums

If you can find a 8-3/4complete for 500skins you better buy it.chunk alone with posi 350 on the low side,got a good gear 391-410 add a 100plus.axles 50 each.housing another 200.yea her at Carlisle I seen a bunch today.crapy gear and 741 cone posi compleat 700.with shot drums.saw bell type drums like on 70-71 40.00 each.guy had 3.took 2 best,old man had no idea what they fit other than a dodge.and I did not educate him or tell him what there worth but good ones are really tough to find and there no longer available aftermarket.489 posi 450-650 chunk alone!