how do they check the engine number if the plate isn't changed?
AFAIK it's on the plastic cover over all the timing belt @ the front of the motor, how would you know if that has been changed and/or worn off?
do they start checking stamped numbers on blocks? Is there any? What if you have EL205 heads and a 207 short block?
not a simple proceedure..
Not having a go, I'm in a similar situation with the 207 in mine, still have original plates saying 205 etc etc..