No just the opposite it all sounds pretty original. The C3-E crank is a 390 crank used from late 62-early 64. The rods and maincaps also correct. Those rods were used for a few years and into 63. The C2 on the maincaps can be found on all FE blocks except the 427 until the early 70's. And the 3026 I bet is a 3C26 and the date code of 63/March/26. So double check that the 0 is a C. Heads 63/March 29th C3AE-C std bread and butter FE lowriser head used ath the time. There are lots of other letters and numbers and stampings etc...most of which pertain to the mold numbering system the Dearborn foundry was using. Some of the stampings are marks for finished parts or to tell the guy down the line these parts are different etc... The B9 oil pump I'll have to check but I'll bet the rocker stands are B9 parts also. LOL. Ford would not change the casting number on the part for years sometimes. They would change or update the part number in the books while the part itself and it's casting number was not changed at all. So to me it all sounds very original. Good deal!

G.