trying to decode a small block mopar engine.?
The numbers on engine are as follows, L/H side of block: 9w 360 6271 and under exhaust manifold: 4006830-360-7 date 8/18/78 BZC D-N-M
Intake manifold is: 4100340-2
Heads are: 4027163
the 6271 is the day the engine was built - it is the day number on the mopar 10,000 day calendar
The table I have only goes to day 4720 which is june 30 1975 - so your motor would be built 1551 days after June 30 1975