i'm running a, i think it's a 1971 904. 440 sb, 9.69@138.50. according to a&a, drum isn't a problem. billet low rev servo, red alto plates, harden strut, use teflon seal rings on support. line pressure is critical. should hold up with 180#, since 904 plates have a smaller surface area than a 727. i have a low 1st gear, 60'-1.30. stay safe, seeya.