Its not an E body, but I've mounted one in my duster behind a 5.7 hemi. I had to widen the tunnel by about 5" and fabricate a mounting setup behind the stock one. The 545 is a large trans, but I think the benefits will far outweigh the extra effort in installing it, when I eventually get it on the road. If you are not afraid to do some surgery to the hump and mounts I'd say go for it.