HP manifolds, TTI headpipes, Jegs 2 1/2" dual exhaust kit (?)

I've been wondering if this would be a fairly straight forward approach to a budget exhaust system for my project: ('70 Dart, LA360), HP manifolds, TTI headpipes, Jegs 2 1/2" exhaust kit with welded mufflers.

Now I'm fairly certain that the Jegs kit won't directly connect to my TTI head pipes, but I'm thinking they might be fairly close. Maybe a custom piece between them? The head pipes, according to TTI, terminate where their headers terminate. On their website, they say that if you want to change out your manifolds/headpipes for a set of their headers, it's a direct fit. SO, how similar are the TTI's to the Jegs kits? How far apart are the pipes where they run back past the drive shaft? If they are similar, I think this could be done.

Yeah, I'm being somewhat of a cheapskate. I wish I had the coin to pop for all the cool stuff, but I'm making a compromise here and there, in order to get this thing done without breaking the bank.