I am not aware of any published serial number data.
Blue book of gun values
The serial number should be 6 digits long. If it isn't, then the gun has been modified and it is impossible to give any estimate of value.
50-500 usd
400 or so
Blue Book of gun values, assorted forearm forums. Good rifles.
4 lbs
Blue book of gun values
270
Blue Book of Gun Values might help
250-350
The value of a 1972 Winchester model 70 270 cal is between $760 to $800. This is good condition price.