[wizard]

Your cross member is the same as mine so no changes to the frame. Your engine seems to sitting at about the same level as my 460 (same size as your 429) BUT our tanks, while very similar in appearance, seem to differ in mounting structure. (I'd like to see how the tank is mounted to the block, water pump, or bracket. The WC uses a vertical flat bracket welded to the bottom that mounts flush with either the front or back of the cross member, not the top. This downward "fin", if you will, is long enough to raise the tank to an appropriate level above the engine. I'll try to get a pic posted tomorrow. It's not actually in the car at the moment, so I can get you a couple of angles.

Hope this is helpful.