casting #s VS model #'s
The CASTING numbers are where Randy said,on the drivers side just behind the head--they get gunked up and are nearly impossible to see if the motor is in the vehicle...those numbers only tell you the cubic inch displacememt and approxamate year...there is a "clock" casted in on the other side that tells what day,month,and year it was made also...
The "other" numbers are stamped in the block just in front of the passenger side head,its hidden behind the altenator,and are often not stamped in very good--you have to be careful cleaning them not to erase them if using a wire wheel or sandpaper!-those tell what year,what vehicle,HP,type of tranny it came mated too,etc..
-I use carb cleaner and a brillo pad or 3m scotchbrite pad to clean them off--those "numbers" are actually letters,a code like CMD or something similar--any numbers next to the letter codes are part of the vehicles VIN # the motor came from...if that part of the block has NO letters or codes,either its hot,and someone ground them off--or the block was "decked" ,resurfaced in a surface grinder while being rebuilt..a factory replacement block might have the code "CE" stamped there(complete engine),and will usually have zero's or no other numbers next to it--(dealers are supposed to re-stamp the original numbers back in,but rarely do..)
