Look for a VIN along the pass side oil pan rail just below the drain plug
VIN# IEI 856
GW340P33810351 stamped on the front below drivers side deck. -pauly
That is actually not the Vin.
That is the serial number.
G = Series Code
W = Windsor plant
340 = 340cid
P = Premium Fuel
3381 = Day 3381 is Friday, October 30, 1970
0351 = The build sequence
You are looking for what is stamped along the oil pan rail. That will be the vin.