hey guys i looking to upgrade my camshaft on my 4k can anyone recommend some good places to go to get it done in sa?

All the big companies do mail order, that's how I got mine done at Crow. More importantly, decide what cam profile you want and see who grinds it.

Anyone else had bad luck with crow cams? My mate builds mild 308 race engines for some older commodores and has had 2 failures due to the cam both which were crow cams.

Mate crow are one of the oldest and best in the business; there are so many things that could have caused that, I'd hardly write them off on that basis; regrinding old cams can always have issues. I'd happily buy from them, Wade or Tighe cams, based on reputation.