Were power brakes always part of the A04 package on B bodies in 1969?

yes , power brakes were in the radio group , as far as i know

HAMTRAMCK HISTORICAL is your friend - yeah Barry!!

1969 Plymouth b-body:
A04 - "BASIC" accessory package (w/R11 "Music Master" AM radio) $177.40
3-speed wipers 5.40
LH - remote mirror - CHROME 10.45
power steering 100.00
& a RADIO (R11) 61.55
---------- total - 177.40


1969 Dodge b-body:
A04 - Coronet Radio group (Super Bee w/buckets, 500 & R/T) $198.70
3-speed wipers 5.40
deluxe wheel covers (W11) 21.30
LH - remote mirror - CHROME 10.45
power steering 100.00
"Music Master" AM RADIO 61.55
---------- total - 198.70

1969 Dodge Charger:
A04 - Charger Radio group (w/o SE) $258.35
3-speed wipers 5.40
deep-dish wheel covers (W15) 38.00
LH - remote mirror - CHROME 10.45
power steering 100.00
power brakes 42.95
"Music Master" AM RADIO 61.55
---------- total - 258.35

Dodge & Plymouth did things their own way, the Charger "RADIO" package is the only one that included "power brakes".