Well depends..... inshore where around Mosselbaai? Day or night?
First I would suggest fresh chokka and sardine... (I mean really FRESH) or get tips from the commercial boys and locals
5/0 to 9/0 hooks, 30 kg upwards trace (30cm) line tied to 3 way swivel and 12oz (or bigger depending on the current ect..) sinker trace line 15 kg (40 - 50 cm) You could even try 2 hooks for a start - one loaded with sardine and one with chokka, PROVIDING you use a KP Reel (8" size or bigger) loaded with 30kg plus line... you might end up hooking two Daga Kabeljoue at once...LOL
Or use a 150 - 200lbs handline...
Should you have better takes on chokka (for example) then change to one hook + chokka...
Night fishing in the Bay.... you could try live bait if you got a live well - try and get some Mullets (Haarders) or Strepies buy at Harbour or use a throw net. Or can catch "Makriele"in the bay with a small rod.
Trace on normal reel ie. Penn/Daiwa/Shimano ect.... use a running sinker and perhaps plastic coated wire....loads of sharks will hassle you at night.
I use to live in Gouritzmond in the 80s and that's way we use to do it....
Hope this helps
Serra