Thanks for the input. I appreciate it.We need more pictures than that to access. But at first first it does NOT fit the horse as it is too wide in front, causing it to sit downhill.
Can't answer "well enough" because it depends what is too wide. If the bar angle is too wide, there is nothing you can do to fix that.
If the bar angle is correct but the gullet is too wide, then you could possibly make it work with certain padding (like a shim).
Can you take a picture to show how the bar angle relates to the horse?
I would also take the cinch off and that trail pack off too, so we can see better.
It is a new saddle so the lining is pretty thick still and it is supposedly for a gaited horse so I believe it is flared somewhat at the front.Looks to me like the gullets way too narrow, but depends a little how thick/fluffy the lining. Looks at first glance that the saddle is too big/long, but it's possibly too far back(not something I often say). It should be clear of the scapula, but it appears there's a bit of flare to the front off the bars so may be not putting pressure there if they were over the scapula a bit.
That guideline relates to english saddles. Western saddles have a larger surface area to distribute the weight and can sit behind the last rib. However, the longer a saddle is, the less likely the tree will match the plane of the horse's back.The saddle passes the last rib so it is not going to work.