Why would you want to?
Or are you getting JUST the PCBs without their own HS/fan setup?
BTW, it's 40 chips per board for the "2.6 Mh/s" (appx) boards - 80 chips was for a 2-board 2-part HS full miner setup at 5+ MH/s
My miners of that type are still packed up, but estimating from known dimentioning and measuring from the box, the part of the board that needs to have the heatsink/BIG THERMAL PAD applied is roughly 4.5" by 10".
Note that these old miners are at best break-even if your electric cost is over about 4c/KWH.
Are you selling them?