The SRT 6.1 Jeep manifold is it's own deal. They are NOT the same as car 6.2/6.4. Durango 5.7 manifolds do fit, they have a larger outlet than the Grand Cherokee's. Both are the log style manifold, probably not good for the supercharger. With no torsion bars, the 6.1 Jeep manifold would probably work. They do hug the block more than the 6.2/6.4 car stuff. Those poke straight out the head and want to clash into the framerails.