there were no 5 lug wheels on these old trucks, 5 lug is car .... I believe 16 was standard for the 1/2T, see the shop manual or owners manual or the GM PDF file on your 54 .... 5" width until the TF series which was 5.5"

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