If you were
wirewrapping or point to point soldering, you
might consider 2114 static rams. Might be easier to get
hold of thah 2101/2102s or 1101, but they won't fit into
the original or copied Mark-8 boards.
Personally, I have quantities of 2114s left over from the COMBOARD-I
parts tubs (32K of SRAM each) and plenty of dud COMBOARDs I could
strip if I *ever* ran out.
2114's don't quite feel 'right' to me for a period 8008 computer. I
guess it's because I had an 8008 in 1976 but no 2114's until 1979.
Personally I would stick to 2102's or 2112's, but that's entirely
subjective.