308 burnout car, catch can?

hi guys,
have built a 308 gemini and first burnout comp is coming up soon, is it 100% neccesary to run a catch can on a healthy 308?

The setup atm has one filtered breather on one rocker cover and a oil cap on the other side...

Leave it this way? run 2 filtered breathers? or run a catch can?

Im just trying to sort out this sorta stuff now save the dramas on skid day..

Cheers
Shane