Clutch pedal to transmission linkage bracket question

[Lemurskin73]

Hello group. I need help locating the proper engine side bracket that allows the pedal to throw out bearing arm linkage to pivot. I have an original 67 gmc that came with a 305 v6 and 4 speed. I replaced the 305 with a 250 about 10 years ago and was able to make a bracket that attached to the side of the 250 block. I'm in the process of replacing the 250 with a 292 and noticed that attachment point is not on the 292 block. Is there a bracket part number for my application or do I need an entirely new linkage? Thanks in advance.

[daddybooz]

Hi there, I just finished with the same issue with a 400 SBC. I started with this: https://www.summitracing.com/parts/n...81shoCSTjw_wcB

And then had to lengthen the tabs to get it in-line with frame bracket. My Z-rod had to be cut/shortened in middle to accommodate the bracket not being attached to the block. It worked good in mock-up, now painted waiting to go back in.

Hope this helps.

['68OrangeSunshine]

What year is your 292 block? I'm not very familiar with 250s. I thought the L6s were all the same. I've had no trouble switching between 292 blocks, but my years were close. [Consecutive actually '68, '67]http://www.PetHarbor.com/WebForm_ConfirmRequest.aspx?req_id=1715500

I'll try to get a pic of the separate Z-Bar ball stud bracket. I have one loose somewhere. My good digital cam went back to Sony for R & R. So we'll have to make do with cellphone pix.

That's a nice part from Summit, but it's for a V8 SBC. Wouldn't work on an L6 without a lot of unnecessary fabrication. Just get the right part.

And here's the right 292 stuff.
[I'd stay well away from Hydrolic clutches. They leak, go out of adjustment and have to be fidgeted with at all hours.Spendy, too.]

[demian5]

Im going with this combo

https://www.novak-adapt.com/catalog/...-hcr3/kit-hcrc

http://transmission.moderndriveline....egory=26&VS7=0

[Lemurskin73]

I'm not sure what year the block is but it does have the 2 threaded inserts in the block for a bracket like the one 68orange posted. I think the 305 had that same bracket if memory serves me. However the location is a bit too forward to work. I will check later tonight when I get home, maybe snap a pic.
The summit racing bracket looks close to the right size but if I have to modify it, I might as well fabricate one for that price.
Thanks for the replies. I will update later tonight or tomorrow.

['68OrangeSunshine]

Here are the Z-Bar stud bracket holes in my '67 block. [Center of shot].It's been sitting since 2004.
Not so sure what exact set-up was on the GMC V6s, but I would guess it would be closer to V8 than L6 stuff. The L6 Z-Bar is wider than the V8 Z-Bar. They are different animals.

[Lemurskin73]

My 292 casting code indicates its from 1963 to 1976. I may have modified the original engine-side bracket from the 305 V6 to fit the 250. Also, is the frame-side bracket fixed or movable? The orange block is the 250, blue one the 292.

['68OrangeSunshine]

Originally Posted by Lemurskin73

My 292 casting code indicates its from 1963 to 1976. I may have modified the original engine-side bracket from the 305 V6 to fit the 250. Also, is the frame-side bracket fixed or movable? The orange block is the 250, blue one the 292.

The frame bracket for the big V6 is about an inch or 1.5'' higher than an L6 [or V8] Generally those are flat on top of the frame, no arch at all. Never seen one like that.
As they are riveted to the top of the frame, no. not generally moveable, but, if you drilled out the rivets and shot new holes for grade 8 hardware, anything is possible. I think you need to acquire a non-V6 frame Z-Bar bracket.
I'll try to shoot a pic of one tomorrow. There's one still on my '67 K/10 Suburban, but it's been converted to automatic. Still need the bracket for a 292/SM465/T221 '72 K/5 project, so I am volunteering no hardware.

The conventional L6 pivot stud bracket is about 6.5'' wide. V8s' Z-Bars were shorter, had a pivot stud on a bracket almost flush with the wider V8 block, except on 4x4 [K-types] a stud screwed right into the block.

So you need to go on a junkyard hunt.
You need:
An L6 Upper Clutch Rod [good luck, they don't make 'em anymore, and the LMC repop is a joke -- might fit a Dodge, but not our trucks. My machinist fabbed one for me with heim joints in 2005. Now they retail them, but for big bucks]
An L6 pivot stud bracket. [as illustrated]
An L6 Z-Bar. [I''l have to pull the dimensions off my rigs tomorrow.]
A flat, Chevy-style [not GMC] Z-Bar Frame Bracket. [Not hard to find, but grinding one off a frame can be a b!tch... Possibly a copy could be milled out of some stout 1.5'' angle iron.]
A Lower Clutch Rod, [Easy enough]
A Fork ''nut'' [Looks more like a wedge]
There should be a lot of rustfree junkyards in your area, if it all hasn't been 'fished out' by high rollers from the rustbelt states.
Good Hunting.