welcome to the site! You also need to loosen (I think it is the top show on the rear) all the way before bleeding to make sure you get all the air out. I made a pressure bleeder out of a plastic garden sprayer and it makes bleeding a lot easier!

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