Can't the battery sit there with out the block off? I guess there's a bracket that is part of the block off?
So back to adding a couple of holes? This would maybe add enough air flow because right now the fresh air doesn't have any where to go so it doesn't even enter.
Has any body else reported this same problem? Isn't this the plate made by fellow inmate Chris?
How come the air doesn't exit through the breather on top of the starter cover?