Would you prefer the 9" standard duty drum brakes? I have 10' heavy duty drums on my 383 GTS and they stop just fine. Now the 9" on my 68 Dart 4-door slant six were hope and pray you may stop, context is everything! The factory sway bars were .87 diameter on 340 and .89 on big block. 1-1/8 would be an aftermarket sway bar and is HUGE!