Stainless varies in grade, some stainless steel is very strong. But the hardware store type bolts are probably not as strong as Grade 8, which is what I would use personally. It's all the bolt you'll need.

Mopar engineers didn't waste money on ultra-strong bolts, if they needed more strength they just used a bigger one! Grade 8 (six marks on the head) is as much as they used, to my knowledge. Well, except perhaps rod bolts.

R.

PS: Foreign bolts with 8.8 on the head are NOT grade 8 bolts and should be left in the bin.