For everyone that's installed a trans cooler what's the biggest size you can get away with and fit behind the grill opening? I've read a bunch of posts and so far it seems like a 9x11 fits well. Can a guy go bigger say to an 11x11 or so and still fit without modifying a ton of stuff? Thank you. I'm trying to find a cooler thatll work with a 3000rpm quad disk stall. I've found a tru cool m7b and an h7b, ones an 8x11x1.5 the others a 11x11x1.5 thank you.