Originally Posted by wayne.yl
What do you mean, make sure the actuator is capable....?
Do they come with difference capacity pumps for more pressure?
The actuator or booster assembly from your 77 is old and subject to many failures.
Changing the rotors is ok, but you need brakes on all 6 wheels on the 34.
I would suggest you change to a new actuator for the 34, and install new brake lines.
The Actibrake actuator will work fine with the original disc brake calipers that came on your 77.
You should install the new actuator, behind the front lounge or in an access compartment.