Heater core doesn't fit. Different parts for same year?

I am in the middle of replacing my heater core. 2000 Sahara 4.0 with AC. I ordered a new core from Rockauto and it does not fit. The best way I can describe it is, after the first bend leaving the main core body the tubing is too long. You can see that they are different in the attached picture. I checked the part about ten times before and after ordering and according to RA this part should fit. Has anyone else had a similar problem? Looking at the pics on RA I think the OSC and FVP look like they match my existing but its really hard to say.

The picture is decpetive because of the angle. The angles seem to be close. If you look at the pic below the area circled in blue is too short on the new core. that throws everything off.

To close the loop here, I was able to get a core from NAPA and confirm that the UAC core I received from RA is not correct.