I'm planning to wall-mount a vintage 'Standard' victorian cast iron sink similar to the one in this question: Antique Cast Iron Sink Wall Mounting Support and Weight Issues?. That sink has two bolt points high on the sink through the porcelain; this sink has two bolt points / mounting tabs low on the sink.
There is a vertical stud centered exactly where I'd like to hang the sink. The wall is completely open in this area, so horizontal studs can easily be added.
There are 4 mounting tabs and brackets. Two on the rear against the wall, and one on each side. Ideally, I would like to mount the sink using only the two rear tabs bolted to the wall.
The standard cast iron brackets available for vintage sinks do not seem designed for this sink's brackets. The pockets are not deep enough for the tabs on my sink, the holes do not align, etc.
My initial thought is to use two heavy duty lag screws + washers through the rear tabs into horizontal studs in the wall. However, due to the geometry of this sink, it seems like that might not work. The tabs are low on the sink, not high near the top lip. And there is no lower structure below that point touching the wall to resist a downward force against the front lip.
This would seem to make the sink top heavy, prone to tipping forward either due to the weight of the sink or from someone putting weight on the front lip.
But perhaps I'm underestimating the strength of lag screws?
The other Issue I foresee is the "lip" that pushes the very top of the sink away from the wall. My solution would be to mount a 2x4 or similar piece of wood to the horizontal mounting studs, pushing the bolt locations away from the wall enough to clear the lip. But I do not want a 2x4 visible on the wall behind my sink, and I'm worried that if I "hide" a small piece of wood completely behind the sink that the bolts will not have enough spacing to the edge of the 2x4 (if that makes sense). Would something like a thick metal washer make more sense than wood?
Are two lag screws a viable way to mount this sink? If not, how should I mount it?