I just went thru that on my 96, I had to cut 4 out of 8 bolts. mine were plain bolts. fastnall had em but I found em at a mom and pop hardware store for half the price.

lower Factory bolts are M14 x 2.0 pitch x 120mm long, class 10.9, flange head, nipple tip

upper M10x1.5, 85mm long