Disk Brake Conversion

[SSMinnow]

I have ordered a rear brake convesion and a new proportioning valve from IHOnly for a 77 Scout with the stock d44. I have stripped the old drums off.

- do I need to, or should I, replace the steele line brake line on the axle? I already have a braided line for the 4 inch lift.

- does the proportioning vavle use the stock fittings or do those need replaced?

- can I reinstall the axles prior to installing the disk?

I have also scored a jy hydra-boost unit. I have read bill's write up at justinternationals. During his upgrade he modified the power steering pump to increase pressure.

- how necessary is this step?

 

[Plug Ugly]

- do I need to, or should I, replace the steele line brake line on the axle? I already have a braided line for the 4 inch lift.

You dont have to, but at the very least, I would cut the last several inches or so off, and convert to a soft line from the axle to the caliper. Makes removing them much easier if you dont need to pull the brake line itself.

- does the proportioning vavle use the stock fittings or do those need replaced?

Depends on the prop valve, or are you talking about a combination valve? A prop valve (say like a wilwood or something) will have pipe thread fittings, that will need to be converted over to inverted flare as shown in jeffs picture of a prop valve.

- can I reinstall the axles prior to installing the disk?

According to his picture, the rotors are a floating design, so yes you can

I have also scored a jy hydra-boost unit. I have read bill's write up at justinternationals. During his upgrade he modified the power steering pump to increase pressure.

- how necessary is this step?

Depends on the hb unit used and the pump. Go to a webiste called vancopbs.com. Iirc, van has some good tech info there about required pressure, and stock pressure from saginaw pumps, etc. Modding a saginaw high pressure fitting is simple, but you need to be careful not to over do it, lest you start blowing sector shaft seals.



For some light reading, I am linking a rear disc write up I did for a Ford sterling rear end. There is a lot of info you dont need there, but it has lots of pics, with descriptions of parts, and other places to locate fittings, etc.

http://www.wt4x4.net/tech/discbrakes.htm