Break in with TTIs

Did ya ever think an exhaust could be such a pain!!
Hi Bob, unless someone has completed that (swap) I would think your not going to get a correct answer. Could be trial & error. I'm sure the van's cross-over pipe not being an a-body; you might run you into a few lining up problems, Not really sure. As stated earlier for only a break-in, if the vans single crossover just won't do, can you just use the manifolds and add your own mock-up extention? I know auto places sell those bendable exhaust sleaves.

Wish you luck