I recently pursued a 74 Jazz bass listed as "original condition". Part of the verification is taking it apart and validating the components. When I found 2 sets of neck holes, I decided to cancel the transaction. I'm thinking the neck was used on a different bass originally. The neck stamp on the heel was red and readable and represented 74. I really could not authenticate the body. It had very little markings in the neck cavity. The condition of the neck itself was mint. Could it be a 74 RI neck? or maybe a non 70's body? Any thoughts on what bodies could be a few mm different?