i goot a set of 300mm upc big brakes of ebay for my 1980rs2000 and need help with info on what to do to the rear brakes to work with the front new member need help steve

i haven't touched my rear brakes, ive got stock calipers with vented/crossdrilled & slotted rotors though, what master are you using?

i think ive seen/heard mention of rear disk kits, enquire around and youll find something

Hi Steve.

Welcome to the Forum.

Not sure about drums but might be easier to sort out bias with discs on the rear.

I have 1 kit left if you're interested?

http://classic-ford.org/forum/topic.asp?TOPIC_ID=18056

Hi, welcome!
rotor size wont make a difference, its the caliper that causes lots of headaches, assuming the calipers are from a Commo or Falcon, they use approx 1inch bore m/cyl f/r. as your running stock drums i think a 3/4in(most modern small/mid jappa cars) or 21mm bore might work ok since drums dont drink much fluid. Try the std m/cyl, if the pedal hits the floor, you will need a bigger master cyl.

On some cars they have a valve that controls the back and front brakes ---HQ Holdens (sorry ) have them ----
and some other cars --- these are adjust able but you will need to know what your doing -- or fit a larger or smaller bore in the back wheel cylinder
--or you can use a set up where there are twin master cylinders and a adjustable bar between the two ---but i have not seen one

or you can only boast ever the back or front brakes
that's about all i know