Topic: Very late 67 proportioning valve

[bazza]

I keep reading they were similar to 68, but despite intensive research, I have yet to find a pic or description. Jeff, anyone, pretty please.

[ruppstang]

IMHO there is no difference in the proportion valve its self only its location. Over the rear axel on the early and under the distribution block same as the 68s.
I have not see a C8 number on the ones I have restored.

[bazza]

Thanks for the response. Would I be correct in assuming that visually, with the exception of the C7 numbers and the 1 wire warning light switch,  the block and valve assembly looks like a 68?
I can't seem to find a 68 style distribution block with C7 numbers to rebuild anywhere.
Has anyone got a spare?

[Bob Gaines]

Thanks for the response. Would I be correct in assuming that visually, with the exception of the C7 numbers and the 1 wire warning light switch,  the block and valve assembly looks like a 68?
I can't seem to find a 68 style distribution block with C7 numbers to rebuild anywhere.
Has anyone got a spare?

The distribution block between a 67 (on left in picture) and a 68 (on right) are radically different. It is the proportioning valve between a 67 and 68 that are almost identical.

[jwc66k]

The distribution block between a 67 (on left in picture) and a 68 (on right) are radically different. It is the proportioning valve between a 67 and 68 that are almost identical.

That's not exactly true. Later (about May) 67 Mustangs used a distribution block very similar to the 68 version. The difference between them is the 67 used two 5/16-18 fender "type" bolts for mounting, the 68 used only one with an alignment pin. The early proportioning valve was definitely located at the rear axle. There was a problem in the brake warning light system, so with a running change, the valve was located at a new distribution block that routed brake fluid to properly center the brake warning light switch.
Jim

[Bob Gaines]

That's not exactly true. Later (about May) 67 Mustangs used a distribution block very similar to the 68 version. The difference between them is the 67 used two 5/16-18 fender "type" bolts for mounting, the 68 used only one with an alignment pin. The early proportioning valve was definitely located at the rear axle. There was a problem in the brake warning light system, so with a running change, the valve was located at a new distribution block that routed brake fluid to properly center the brake warning light switch.
Jim

Jim ,you may be correct about a difference on very late 67 Mustang production but I would double check your research as it applies to what you call earlier. At least not prior to July 67 on the SJ built 67 Shelby's. That is fairly late production from my point of view.  I would assume the rest of Mustang production followed the trend at that plant as well. 67 Shelby's did not use the later style distribution block and forward mounted proportioning valve.

[J_Speegle]

Jim ,you may be correct about a difference on very late 67 Mustang production but I would double check your research as it applies to what you call earlier. At least not prior to July 67 on the SJ built 67 Shelby's. That is fairly late production from my point of view.  I would assume the rest of Mustang production followed the trend at that plant as well. 67 Shelby's did not use the later style distribution block and forward mounted proportioning valve.

That's the problem/issue with using early and late to describe not a mid year change but instead the earlier and later versions of a part.  Maybe we should give some thought of coming up with a new term to describe these multiple versions used in a production year> Maybe (just to get us thinking)  First and second version. For 67 it can be a real challenge as we could end of with three or four versions of some items through whole production year

Unfortunately the OP didn't specify the specific plant. And we've not compared use of these two items between the three plants though use may be similar

With that stated and getting off thread a little below is the latest/highest sequential 67 San Jose example I found - 7R02S238xxx  with a projected build date of 28U. Real date could be the last week of production or a month prior not leaving allot of time for a possible change to the newer style and all the supporting other parts needed

[bazza]

Jeff, the build date and plant are in my signature line. Definitely late.
My impression is that unless there was completely different block, the only way to move the prop valve to the front, would still require it to be plumbed into the rear line.
There are plenty of comments about the change of location of the valve, just no pictures or numbers of the parts required to enable the change of location.

Jim, the arrangement you describe seems to be what would be needed.
I keep getting treated like I'm sorta .. "special", when I ask for a 68 style with C7 numbers.

Thanks for everyones input.

[J_Speegle]

Jeff, the build date and plant are in my signature line. Definitely late.

Sorry over looked it

There are plenty of comments about the change of location of the valve, just no pictures or numbers of the parts required to enable the change of location.

Where are you finding these "plenty of comments about the change"? Guess your referring to late 67 or just the change from one location to the other?

Well you have the different junction block, different rear feed line, clamp for the valve and any different lines (should be able to confirm with the MPC and assembly manual) for the different junction block.  Surely missing something but those are the ones that come to mind

As a side note its unfortunate that this detail is not documented on the buildsheet as it could help confirm what the last 67s at San Jose originally had.

[bazza]

I did find these pics in an earlier thread, don't know its application.
Jim, does it look familiar?

[jwc66k]

At least not prior to July 67 on the SJ built 67 Shelby's.

This is about a regular production Mustang, not a Shelby.
Jim

[bazza]

Sorry over looked it

Where are you finding these "plenty of comments about the change"? Guess your referring to late 67 or just the change from one location to the other?

Well you have the different junction block, different rear feed line, clamp for the valve and any different lines (should be able to confirm with the MPC and assembly manual) for the different junction block.  Surely missing something but those are the ones that come to mind

It was about the change of location.
http://www.concoursmustang.com/forum/index.php?topic=11541.msg69452#msg69452

It is also the "different junction block" assembly that I'm looking for information on.
Seems the valve itself is the same between early and late.

[Bob Gaines]

This is about a regular production Mustang, not a Shelby.
Jim

A Shelby started out as a unfinished regular production Mustang  . Apparently you are unaware otherwise you would not have made a uniformed statement like that . My interests are for the Shelby cars however since they started out as regular Mustangs my knowledge extends to the aspects of regular Mustangs that are the same as on the completed Shelby cars. Disc brake systems are with few exceptions depending on year the same on Shelby's as on a regular production Mustang with disc brakes. In this 67 distribution block issue there is no reason to think that a regular Mustang with disc brakes would be any different then a Shelby with disc brakes. Since I am known for studying Shelby's and not regular Mustangs I wanted to explain how I came to my conclusion on a regular production Mustang.

[bazza]

I've just found this pic in this post. This is the distribution block I'm looking for information on.
http://www.concoursmustang.com/forum/index.php?topic=15440.0

[J_Speegle]

It was about the change of location.

It is also the "different junction block" assembly that I'm looking for information on.
Seems the valve itself is the same between early and late.

I've just found this pic in this post. This is the distribution block I'm looking for information on.

Doesn't look like that would apply to a very late Dearborn 67. Think there is some confusion here. Could not find any 67's within months of your stated build date with one of these