we are comparing three very different cars here.. the new early 00 explorers have more room than the mid-late 90s explorers, which have more room than the early 90s explorers.. i think 9 cubes ported will be pushing it in an old school explorer.. cause 9 cubes would be taking up most of the space in my style, and you have less space.
give us dimensions! then we can tell you how big of a ported box you can fit. some dimensions were given, but theyre not the same as yours... mine are like 40.5 wide (before wheel well humps in panel), liek 18ish high before the headrests, and somethin liek 30ish deep (cant remember this dimension) but either way, yours will be different cause you have a different style suv than i do.