I just re-read my thread on Pirate about it and I think my confusion came about because of the different spacers that are available.
The flat 6.0 flexplate uses a spacer between the crank and plate thereby spacing the plate out equal to the dished flexplate and extending the pilot journal bore. The spacer that people who use the dished flexplate use goes between the flexplate and converter, thereby just extending the pilot journal and doing nothing with the spacing of the plate. My confusion came about because people kept referring to spacers without knowing the difference between the two. IE "I used a dished flexplate and spacer and it works fine." "Well that's funny because I used a flat flexplate and spacer it it works fine, too."
So I *THINK* you can either use the flat 6.0 spacer and flat flexplate or the dished flexplate with the Summit spacer.
J. J.