FJ20 Careless hit the nail on the nail the footprint wont make a lick of difference when dealing with moments.
However in probably mine and your defense:
If you look at where my mounts are place you will notice they are directly in front of the T/C box and about an inch behind the stock crossmember location (not in the pictures). Both these locations can be considered fixed IMO because the frame rail is not going to flex at either point.......................................
The s30's body is relatively weak compared with modern designs and needs all the strengthening help it can get when using a powerful motor, actually around the point mentioned above an additional Xmember will improve the situation in a stock car.
Some very relevant and helpful comments have been made in this thread, from personal experience it can be hard to take notice of good advice when it means alteration of something we have already done.