Grit dog wrote:
At that, imagine the factors of safety designed into the vehicle components and don't obsess about a few......hundred lbs here or there.
IMO that is a VERY DANGEROUS ASSUMPTION. There are probably actual safety related design margins, but there are much more items like say drive shaft spline strength, u-joints, on and on that don't have the level of design margin built in that you are assuming.
Just your undefined "FEW HUNDRED LBS" can mean 100 to maybe 500/600 depending on an individuals definition which is totally SUBJECTIVE.
A couple of prime examples is the original cooling system for the 7.3L and the 4R100 tranny/TC system for the 7.3L. One requires a retro fit and the other is a well know "WEAK LINK" in the drivetrain. Neither of these IMO would classify as "SAFETY RELATED", but sure would ruin your day and cost a $$$$$$ if you ignored them or exceeded their original design concept/usage.
Larry