disc brake swap on 68 charger

[cheno2]

I have person that recently came into my shop(dealership). He has an 68 charger in (another shop) being held hostage. He has them doing a disc brake swap from an 86 diplomat(cop car). They are also swapping steering gear as well. Do they need to switch master cylinder/ booster as well??? The charger is a power brake car. I told them the original master cylinder/ booster should work.?.? Am I correct. Also will that steering gear work? Will he need a different coupler from colum to str.gear? He not sure if he should have used this shop or not as they want "everything" new. I would like to help him and may even offer assistance at my personal shop.
Thanks in advance for any help.

 

[ga66mopar]

I'm assuming the charger is now a drum brake car. The drum brake master will have to be changed. The drum brake power booster will work but it will require a little more foot pressure. The factory disc brake booster was a bendix dual diaphragm booster. The drum brake booster is a single diaphragm booster. Seems like 68 used a small spline pitman arm. 73 and up used a large spine pitman arm. So they would have to use the pitman arm from the 86.

 

[cheno2]

Thanks for the info. Yes it is was drum brake car. What about brake poportioning valve????

 

[Propwash]

Yes, you need a prop valve. You can find the factory Prop vavle and replace the distribution block that is in there, or just leave the old distribution block there and add in an adjustable prop valve on the line to the rear brakes.

http://www.getdiscbrakes.com/partfinder/product/list/?year=1968&make=Chrysler,%20Dodge,%20Plymouth&model=B%20Body%20-%20Charger,%20Coronet,%20GTX,%20Road%20Runner&category=Boosters,-Master-Cylinders,-Valves&cat=1256