Well what do you know? I messed around with the DIY4X engine mount and swapped the cross brace around 180 degrees and it fit with the big block chevy in between the rails. I noticed as the cross brace was sitting on the ground that the tube appeared to sit slightly off center, so I spun it around and it fit like a glove (kind of like an OJ with swelled hands glove, but it fit) you could probably fold a dollar bill in half and slide it through the tightest two spots (corners of the oil pan) I will make some 1/8" spacers from some sheet metal to give it just a little more room I think.