If you disconect the Vac pipe from the mainfold, see what the pedal is like then,
if it's ok you have a servo fault, I keep the seals in stock for all types
Are you sure its a type one? Vac control unit at one end and Hyds at the other.
Rex Ward
If it was only that easy.
1 adj the side bolt.
2 adj the 1/4 inch dia bolt to pull up one end of the band.
3 tighten the large nut to pull in the other end of the band.
If you get it wrong it will smoke, still it is old enough to do that!
The boxs do wear but it is possable to get all the parts to rebuild the box as new. only problem is that it is that job is best left to a pro as you need a press and a reamer to do a proper job.
You have to be carefull when fitting a non GMC servo as it may well not have the fulid displacemant that is nessary to put on six wheel cylinders.
I do have NOS early type GMC servos in stock plus I have the kits to repair them should you get stuck.
Rex