I probably missed it, but are you certain that the 861V6 uses the DSPA56367PV150?
Hi Frank, I read it in the new data sheet.
CD20 & EF20: Internal (no rear panel) 48-bit DSP cards each containing two Motorola 56367 chips running in dual precision mode, each card offering 300 MIPS (million instructions per second) capability.
This revised data sheet is now on Duncan's site; of course the data-sheet could be wrong (it's not unheard of

) esp. as the cards are listed as CD20 & EF20 which are the ones fitted in the 861v4 and M state that the old cards (V1-V4) are not compatible with the v6.
I guess we will not really know until someone has one and take the lid off it.
Regards,
Carl