K-Frame is the same for the six and 8 cyl. since those cars nover came with a big block the answer is no, there is not big block k-frame for them.. when i did mine i used c-body engine brackets with custom pieces going from there and bolting to the k-frame.. thise was before swap mounts were out for them. these are the swap mounts for those cars.. '63-66 A-Body Mopar Big Block Kit
exhaust was the biggest expense when i did mine, had custom headers made for it.. to me it was senseless to stick a 440 in th ecar only to run manifolds..
View attachment 1716297492View attachment 1716297494View attachment 1716297495View attachment 1716297493