Trans crossmember for my '72
 

I'm planning on running Chevelle headers on my '72 C10...bought a set for a great price and I like how they tuck up along side the frame. Obviously the stock TH350 trans crossmember isn't going to work because of the header collectors running right straight into it. I saw a listing for the Transdapt 6420 crossmember and it looks like it might work but I can't tell if the humps are high enough to clear the exhaust or if it will work in a non LS swap. Any ideas?