ok, a friend gave me his old engine/tranny after he swapped, its the same engine as my lx, the d15b7, but i was wondering what the numbers meant. where it says d15b7
if you are looking at it, to the left of it and turned sideways/vertically written it says
C5B P20

whats that mean?

question 2

on the tranny it says s20
whats that mean?
thanks