I've aquired a zz4 camshaft for my 89 and
Installing new cloyes #9-1145 double row timing chainset same time.
Just noticed it has a setting being the multple key way type(on installation sheet) for HP or Torque or straight up what setting do you suggest to use??

 

I would just go straight up myself!

 

straight up unless you have some very specific reason for doing otherwise; i.e. tractor pulls; insane race only rpm; etc.

 

Straight up it is