Update:
The second engine bent one rod and broke two ring lands so they are the weak part above 650 on the stock engine. I still haven't taken apart the first engine which broke bad.
I kept the car, installed a third stock engine for now, and now working on bring some new parts to the market. Manley will now be making a rods and pistons for the VQ37 and hopefully soon I'll have a full stand alone working on the 370z. I've been working with Syvecs and it pretty close.
I also switched the drag radials out for 28/10.5w-15 Mickey Thompson ET Drags, used the spare wheel and some new 18" M&H front runners to make skinnies up front, ordered a set of Driveshaft Shop axles, and going to try a custom rear suspension to see if I can get the car down the track and set a new record.