Exhaust crossover - question regarding flow

[75-1138604505]

What affect does the exhaust cross over have on the flow of the port? Being more specific I am working on a set of heads for a ford 460 casting # D3VE. One port in each head has the exhaust crossover plumbed into the wall of the bowl creating a large open area on the long side. I do not need the exhaust crossover warm-up feature and will be block at the manifold. I am considering filling in the hole in the wall but would like to know if this hole affects the flow of the port before going to the extra work.
Kurt

[maxracesoftware]

[75-1138604505]

Thanks for the reply,
You just saved me a bunch of needless work. You even answered my underlying question of the exhaust gas contaminating the fuel charge during overlap. I was saving that one for further posts. Do you also read minds :laugh:
Kurt