Proportioning Valve Routing Plumbing Help

The fist pic posted here is the one off my '77 AMX Hornet going on to my '75 Gremlin.

The first photo is a combination valve (pressure differential switch and proportioning). The proportioning valve is under the nut on the right. Older drum brake cars didn't have that nut on the side. Some combination valves (mid 70s) also have a metering valve. Metering valve combos have both front brake lines on the valve instead of one in a T between the combo valve and master (usually the left front off the T).

65-66 disc brake cars don't use a proportioning or combo valve, simple switch block like drum brake cars. They used non-servo rear brakes to reduce rear brake pressure/lock-up.

67-70 disc brake cars used the same switch block as drum brakes with a proportioning valve in the rear brake line, bolted to the rear sill near where it kicks up over the rear axle. I could be off a year here, going by memory... might be 68-70, with 67 using non-servo like 65-66.

71+ cars used a combo valve. 71-74 or so used one with metering, later eliminated the metering valve.

The picture above is not so clear to tell but "generally" disk brake AMC's before 71 had a separate differential & proportioning valves and after 71 had a combination valve (differential & proportioning) located up front on the passenger side.

BTW: This isn't the proportioning valve, it's the pressure differential switch.

-Steve-

you really should get a copy of the factory Technical Service Manual. utterly unlike Haynes all all those crap books. you won't believe how useful and interesting they are. i can't imagine working on my ramblers without them. they're incredible resources. pics, tables, procedures, specs. all of this is in there, including how to reset the little tell in it, etc. color codes. invaluable. best money you;'ll spend on the car. get an original if possible, even greasy pages. the photos are worth it.