I have seen several cases of wide date gaps on 70 #854 blocks....we even have one in the garage. Block has a casting date of G 1 9 July 1, 1969....assembly date on the engine is T0701CTY... July 1, 1970...car has a first week of July date on the cowl tag...trans and rear are within a few days of each other. The VIN on our car is approx....14,000 units later than this car...so that looks good too. This Nova is completely documented and stampings are the real deal...
wilma