The vette system IS tightest/closest to engine but is also the most pricey. I understand the fbody alt pitman issue. In my set up, the previous owner installed engine slightly forward (maybe an inch) to avoid this issue. Drawback is the f body pan had to be notched when I put it in later (I had the LH8 pan). I like the vette or the system that has alt up high...looks best and easiest to work on. I would go with this system. Yeah, I recall you not liking the Chinese made Holley stuff! I like stuff engineered to work together. I worry about "drivetrain angles", and companies like Holley and BRP address this issue. To each his own! Off topic- how close are you to finishing your z? What happen to your 1981 Z?