"Does a stock chassis need lubrication every 1000 miles,
or
can you go a few 1000 miles more since highways have come a long ways in the last 60 years?"


Maybe yes,
or,
maybe yes.

I do it it every couple thousand miles, or, every year in the early Spring. It takes about 15 minutes by me, or by a good Shop. Most Shops do not know the grease points, especially brake pedal shaft.

http://chevy.oldcarmanualproject.com/shop/1954truck/54ctsm0009.html