Anybody with a TH400 and X-pipe dual ex?

I want to run a TH400 with a sphon TA but Lanes wheels said that dual exuast with an x pipe wont clear the sphon TA. He suggested trying to find a Yank crossmember that has a TA mount built into it. So does anybody have a TH400 with true dual exuast with long tube headers on a lt-1 fbody?
Clint

Anybody??