A bolt-on solution for upgraded 2.9/4.0OHV head hardware has been found!
The ARP Head stud kit that's specified for a 2000cc lima/pinto 4cyl is a direct, no-mod fit. Kit #151-4201.
It comes with 10 studs, washers, and nuts. Two sets need to be ordered to fulfill all 16 studs that are needed in the v6 application. I got a pair of them from Summit, for about $100 cheaper than the kit Morana sells.
And you get spares at the end of it. I used the torque specs that came with the kit. Three passes at 30, 60, and 90 ftlbs. They are a tad long at first, the bottom of the threads is pretty much flush with the bosses on the heads, but after stacking a gasket and the included washers into play, it's no issue. There may be a clearance issue with the front accessory brackets that bolt on top of the exhaust runners but a little bit of grinding is but a small sacrifice.