I swear by power bleeding but you have to make sure the shoes are adjusted up properly. I like to adjust them tight so I know there's no excessive play then back them off when done. If after all the air is out, then you may need to adjust the pedal to master rod to get the freeplay needed,
Scott

Scott Ward

2 1948 1.5-ton Loadmasters
The red one and The snow pusher
1 1950 3100
1 1955.1 Chevy 6500
1 1954 Chevy 6500 2-Ton
1 1955 1st Series COE 5700
1 1963 K20 (454)
1 1964 C10 (350)
1 1951 1.5-ton Dump Truck
1953 and a 1956 Ford F800

Raising a teenager is like trying to nail Jello to a tree!