I got mine from NAPA, they're in the general system, perfect match to original weight .... it may be that you found them light because you got the ones without the rocker? you also need to remember there's a reinforcing "strap" on the back that may not have been included, and there's an angle bracket under the back that attaches to the cab - don't evaluate the strength by the bare step

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics