I have an LS1/T56 that I am trying to tune after installing it in my Datsun Z. The previous owner passed away before I could find out what camshaft he had put in. He did say it was a "midrange" cam. What I can see is Scat rods, Mahle piston, ARP bolts everywhere, dual valve springs with titanium retainers, ported 853 heads, FAST 92/92 TB,FAST fuel rail with (I think he said) 42 lb injectors, 85mm MAF, and I put on Hawks Third Gen 1 7/8" headers. After tuning the VE tables and Idle tuning several times it runs a lot better but at cruising speed it stumbles and hesitates. If it were carbs I would think it's a bit lean. Reading through all the info here it seems I might need to compensate for my O2 sensors being so far away from the stock location. Is there a calcualation for this or instructions somewhere I just couldn't find? Here is my tune and log. Do you see something that I need to fix?