FW340P30380144
F = year 1970
W = Windsor assembly plant
340 = engine displacement (duh)
P = premium fuel
3038 is Friday, November 21, 1969 (date engine assembled)
0144 is engine built that day at that factory
So this is out of a 1970 model vehicle. The block VIN might or might not help attach it to a car model. They normally are about 3 to 6 month difference from cast to build, but not always the case as supply and demand also effect this.