Got my Boyd's fuel tank in, it's an absolute work of art. After hours and hours of contemplating it I've decided I am going to put the original oil pan back on and shift the motor mount to the back holes. When I wonder why later I decided because:
1. The original oil pan is 8qt vs 5qt. I can only assume the 3 extra qt provide better cooling and lubrication capacity.
2. On the LS3 two of the transmission bell housing bolts mount to the oil pan. The muscle car oil pan doesn't have one of these bolts. Everything I've read says it is okay, but it leaves an unsupported section where the bell housing touches the block on the passenger side. Probably fine structurally, but I can only imagine it would make a vibration noise one day that I'de never be able to figure out.
And the garage is once again cluttered while I take everything back apart.