Any real difference between factory 340 and 360 connecting rods?

To the OP, there is not particular reason to go out and buy a new set of rods unless you just want to spend money and lighten your wallet $200.00 to $400.00 dollars, plus balancing costs.

Granted 7 of one forging number and one of another is odd; form, fit, function is equal. No particular reason to discard them because of the odd match up.

Here's a question, has this engine been apart before? Odd as it seems, it could have come out of the factory that way. God only knows and he ain't sayin.....