Use a powerrack .
good ab strength or maybe a suspected hernia ,piles/ pyles . I used them a lot because I started with sandbags and have shoulder flexibility issues which prevent from squatting heavy safely.
I could around 180kg circa 400lb at one point. You get used too the pain . Don't use padding because you will loose stability . You will be using singles unless you going quite light. I know Westside used to like them a lot.
Personally I would not do them , high injury risk for very little gain and front squats are much harder.
If you have good flexibility squats for quads, deadlift variations for everything else. At least for maximal strength. If you could do the sandbag version it will limit the load , work your abs like you possibly want and give some quad work too. It's harder than the barbell version (safer too) as the bag will get much bigger than a barbell.