> So...list of items to do...
> ... Install new memory chips (6 6464)

It may go without saying - but just for clarity, it wouldn't be expected
that you'd keep the existing two 6116 chips and additionally install six
6464's - but instead you'd remove the current 6116 chips, install the
six 6464's into locations Z2, Z3, Z4, Z5, Z6 and Z7 and then change the
jumper on the board to reflect 8k chips vs. 2k.