[jwhotrod]

grade 8 bolts are brittle, not good for shock loads especially side loads in suspension, etc. i have seen grade 8 bolts fail in coilover mounts. grade 5 bolts take the shock loads much better due to the fact they are more ductile. as to stainless steel bolts, the hardware store stainless steel bolts are softer than grade 2. which we call butter bolts. you would be much better to go to ARP for bolts they generally are 185,000 psi structural bolts that are not only stronger but also ductile to take the shock loads. their stainless steel is also 185,000 psi. good luck!