Here is kind of a rough draft, mostly info from this thread.
model
spring #
2-DOOR
FRONT
2.3, AUT, BL
MB3Z-5310-J
2.3, AUT, BL, SAS
MB3Z-5310-J
2.3, MT, BL
MB3Z-5310-J
2.7,, OBX, SAS
MB3Z-5310-F
2.7, BL
MB3Z-5310-K
2.7, AUT, BASE
MB3Z-5310-M
4-DOOR
FRONT...
Good info, thank you. How many different letters is there used for the 2.7? Just trying to get an idea of the range so we can tune the suspension height for adding weight down the road.