Trans Crossmembers: Old question, new twist, I think

[flipper58]

I am going to be doing an LS3 4L65E swap and am looking for the appropriate trans crossmember. While I have searched the forum and learned a lot about the choice, I noticed that some folks have had exhaust/header interference problems with certain crossmembers. I have the PB trailing arms crossmember with openings for the exhaust. My plan is to use stock exhaust manifolds and run duals straight out the back. So, my question is has anyone encountered a problem with the following transmission crossmembers interfering with the exhaust?
ECE
CPP
Choppin' Block
PB

Thanks,
Phil