Hi POPS,
The DME in the ebay add you posted ----I think is mislabeled.
From ebay listing---"Moronic ecu 0261200075 for a 1985.5 Porsche 944 never used"
I found:
The ECU is used for the 85-88 951 aka TURBO
I have no reference that it may work in a NA.
My source is the Bosch Automotive on line catalog--Fuel/Air Control Unit 08-1985 to 07-1988 turbo 951:
Bosch Automotive Aftermarket - Products
Or search from the beginning on Bosch:
Bosch Automotive Aftermarket - Products
If you bid-----check with the lister or do another search.
GL
J_AZ