HELP! Body Number Location on 70 340 (H Code) Swinger

Now that is something that is most certainly a topic to talk about. The two areas mentioned, the package tray and on the right quarter trunk lip are the spots that seem to jive but its the under the hood spot that tends to be different. I dont have a 340 Swinger (YET) but I hit the shows and look at every one of them. A buddy of mine has an unrestored 340 H code Swinger and his VIN numbers are on the radiator support about even with the left valve cover right on top. At first I questioned this location but I have seen some more with the numbers stamped there. My car is a base 6 cylinder car and the package tray and quarter trunk lip are accurate locations but there is no vin on may radiator support. I wont be pulling the fender anytime soon to check to see if the numbers match. The package tray and trunk lip ones do so I will just go with that but is this radiator support vin legit or are some people just stamping numbers with a punch in some instances. My buddies 340 is an untouched original paint car but he is not the first owner and I talked to him about this and he too would like to know if these numbers are in a legit spot. This is one of them topics that could use clarity!!
Chas.