It is a '69 Dart. I have a cutout to replace it, and I honestly haven't been under it to see the condition of the crossmember. It was used and abused, lots of race modifications at one time, it appears. I also have the option of buying an AMD part to replace it.

1969 Dart GTS 340
1969 Super Bee X9 N-96
1969 Coronet R/T X9 N-96
2015 Dodge Dart GT
2019 Ram 2500 Big Horn.
Looking for the original block for my Bee. The last 4 are 7449