if you look by the dizzy, there will be a 4 digit numbers
the 205 blocks which had 2's & 3's (e.g. 2222, 2232) in the 4 digit number were picked to make the cosworth engine - the rest were used for other pintos (non cosworth)
apparently the bores had less intolerances if 2222's were stamped into it
my last cossie 205 block had 2222 stamped into it