welcome to the site! I'm afraid I can't help you as I have big bolts and left the running gear stock for the most part. When I had my 59 Suburban, I did put newer springs and axles and steering under it but left the frame alone.


Mike
1955 Chevy 6400 ex-flatbed (no bed now!) sold September 2023
In the Stovebolt Gallery
1958 Chevy 6400 flatbed W/dump
In the Stovebolt Gallery
1959 Chevy Suburban Owned for almost 20 years, Daily Driver -- sold May 2016
In the Stovebolt Gallery

Sufficient unto the day is the evil thereof