I got the Macho X2 setup for Push/Pull. Heres the catch i got no room for exhaust fan. Should I remove the pull (back of side of cpu cooler) to have an exhaust fan or leave it in push/pull??
Leave it in Push/Pull. Nibble out the case exhaust fan grille. That would be the optimum for CPU cooling.
If there's a hot GPU in the system that blows hot air around the case, it gets a little more complicated - and case exhaust fan might be needed. Would still remove the case exhaust fan grille. And remove any extra PCI slot covers.
You didn't state how the case intake fans are setup. Getting good clean front-to-back airflow is key for CPU air coolers.
When in doubt, the best thing is to test both configs. More work, sure, but at least you will know for sure what works in your use case.