49-54 Chev "uprights" are one in the same. '54's will not lower a '50. There is at least one 12 Port advertiser that builds dropped spindle supports for 41-54 Chev front ends and has for years. No reports of any breaking and he adds in a bit more caster for improved directional control. There's a nationally known suspension part builder that manufactures dropped spindles out of thick wall tubing. They work well unless you actually want to drive the car. There have been reports of breaking.
