Ronstang, actually that is a j-car stock rack. the j-car rack is mounted on the firewall, so the tie-rods do attach to the front in the same orientation as pictured. but your rifht in saying that it won't clear the headers.
speed direct is using a unmodifided rack. randell uses a modified rack, the take-off is on the aft of Randalls rack. i believe the dodge intrepid rack is a better canidate anyway.......and it is a center, not a end/side take off.
this(speeddirect or sixto) is the origional j-car rack research, this set-up started all this. i've made a set of sixtos brackets before, it didn't clear my stock 351w manifolds in my 69. so i figured that you needed to come off on the back. i lost interest, but the infamous thread is in the faq's. its really good to read.
randell reconized this, modified the rack to "take off" from the oppisite side, allowing it to be placed further forward. there is actually a-lot of r and d behind randalls. if i did't come into some cash, i would've got randalls, not the power tcp. as far as speed direct, good luck clearing headers with it.