Maybe this post with pictures may help. Rather old pics, at mid-point of this project,but it is before the tinwork was done so there is a clear view of space and availability.The 2" fenderwell headers have since been replaced w/homebuilt Hedman 2 1/8" shorter primarys from a modified kit. They look similar to dyno/sprint car headers due to the fact that the tubes exit over the frame rails in a straight exit from the head's exhaust ports.Remember this is an A body, w/ a B body you may have even a little more room.Hope these pictures work Bill https://board.moparts.org/ubbthreads/ubbthreads.php/topics/2005202/1.html