Odyssey X86 heatsync swap

Say i want to swap the heat syncs on the x86 ie: fanless to board with emmc for pfsense and fan over to the one without emmc. what will be needed as far as thermal tape paste?

what’s the “heat syncs”? @ernieboxer

cooling fins and fan the black aluminium plate.

This back is fixed and not recommended for replacement.It is easy to damage electronic components. @ernieboxer