Early 1968 GTS Fender Tag question...

My early 68gts was 100% stock including center nose cone had the HD suspension didnt recall the sway bar thought i robbed that off my 70 duster. Did do a full transplant from the gts into my 67 gt vert.
Dont see how ma mopar could call drum brakes heavy duty they were chitless @ 135 mph
ill look at my build sheet its been awhile iam old now :). Early only being 1967 ?
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!