Which 6.1's did they go with, the Jeep 6.1's (which are a little more streamlined) or the car 6.1 manifolds? Sounds like you've already got the manifolds chosen and committed to, but the latest generation of 6.4 SRT8 Jeeps use a really nice cast exhaust manifold. Any pics of the 6.1 manifolds installed and the mods needed (the 5.7 manifolds are in the pics)? It looks like it had a frame notch on the driver side. Really neat build. I love 70's trucks (had a 77 Warlock with a 440 20 yrs ago).