SBC/BBC Z bar - The 1947 - Present Chevrolet & GMC Truck Message Board Network

notchbackgta · 01-14-2014, 10:20 PM

I am new to these trucks, so if this has been covered a lot please excuse me. I have been reading here for over a year now, since I got my 69 C10.

Currently the truck has a 307 with a 3 speed. I pulled the 454 out of my Camaro since I thought it needed valve guides and possibly rings, but it turned out to be the intake manifold gasket sucking oil out of the valley, so I had some rebuilt heads I put on it and I want to put it in the truck now. I am going to a 6 speed, and want to keep the mechanical linkage in this vehicle. I am going to use a 621 bellhousing with the McLeod adapter plate and an extended pilot bushing.

My question is, do I need to get a different Z bar for the BBC? I have no experience with manual clutch linkages, so I am not sure whether the Z bar for a BBC would be narrower between the pivots than with the SBC. All my other cars have had hydraulic clutches, so much easier and less parts...

Thanks for any answers, I want to get as much mocked up in the LWB frame I have before I do anything to the truck.
James

notchbackgta · 01-20-2014, 01:59 PM

Really, no one can tell me whether the Z bar for a BBC is the same as the SBC?

**uncle** · 01-20-2014, 02:10 PM

Not same. You could only get 3 on tree or what I call granny 4 spd in truck.

notchbackgta · 01-20-2014, 02:26 PM

Quote:

Originally Posted by uncle

Not same. You could only get 3 on tree or what I call granny 4 spd in truck.

Any idea whether this part is reproduced then? I have been looking but I can't find one, or I wouldn't have even asked.

What does the transmission difference have to do with the Z bar?

**'68OrangeSunshine** · 01-20-2014, 03:37 PM

The Truck Shop carries V8 Z-Bars for the L6 and V8 SBC. No idea if the BBC takes a different Z-Bar. My '67 K/10 Suburban had a 454, but the PO put a TH350 behind it. The Sub was originally a 283/SM420 rig.
Try:
www.TruckandCarShop.com

V8 Z-Bar: p/n 67-12910 $39.00

notchbackgta · 01-20-2014, 03:55 PM

Quote:

Originally Posted by '68OrangeSunshine

The Truck Shop carries V8 Z-Bars for the L6 and V8 SBC. No idea if the BBC takes a different Z-Bar. My '67 K/10 Suburban had a 454, but the PO put a TH350 behind it. The Sub was originally a 283/SM420 rig.
Try:
www.TruckandCarShop.com

V8 Z-Bar: p/n 67-12910 $39.00

That's helpful, thanks. I can section one if needed then, build that on the frame before I start my swap.

**'68OrangeSunshine** · 01-20-2014, 08:31 PM

IIRC, the L6 Z-Bar is not as wide as the V8, since it uses a stand-off bracket on the engine, while the [4x4, at least] V8 uses a pivot stud that threads into the side of the block itself. I will take a tape measure outside and get actual measurements.

OK, here's the dope: V8 = 7'', L6 = 5-3/4''

01-14-2014, 10:20 PM	#1
notchbackgta Registered User Join Date: Dec 2011 Location: Earth, NJ Posts: 479	SBC/BBC Z bar I am new to these trucks, so if this has been covered a lot please excuse me. I have been reading here for over a year now, since I got my 69 C10. Currently the truck has a 307 with a 3 speed. I pulled the 454 out of my Camaro since I thought it needed valve guides and possibly rings, but it turned out to be the intake manifold gasket sucking oil out of the valley, so I had some rebuilt heads I put on it and I want to put it in the truck now. I am going to a 6 speed, and want to keep the mechanical linkage in this vehicle. I am going to use a 621 bellhousing with the McLeod adapter plate and an extended pilot bushing. My question is, do I need to get a different Z bar for the BBC? I have no experience with manual clutch linkages, so I am not sure whether the Z bar for a BBC would be narrower between the pivots than with the SBC. All my other cars have had hydraulic clutches, so much easier and less parts... Thanks for any answers, I want to get as much mocked up in the LWB frame I have before I do anything to the truck. James Last edited by notchbackgta; 01-14-2014 at 10:36 PM.

01-20-2014, 01:59 PM	#2
notchbackgta Registered User Join Date: Dec 2011 Location: Earth, NJ Posts: 479	Re: SBC/BBC Z bar Really, no one can tell me whether the Z bar for a BBC is the same as the SBC?

01-20-2014, 02:10 PM	#3
uncle Senior Member Join Date: Aug 2003 Location: Conyers,Ga. Posts: 7,288	Re: SBC/BBC Z bar Not same. You could only get 3 on tree or what I call granny 4 spd in truck.

01-20-2014, 03:37 PM	#5
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,432	Re: SBC/BBC Z bar The Truck Shop carries V8 Z-Bars for the L6 and V8 SBC. No idea if the BBC takes a different Z-Bar. My '67 K/10 Suburban had a 454, but the PO put a TH350 behind it. The Sub was originally a 283/SM420 rig. Try: www.TruckandCarShop.com V8 Z-Bar: p/n 67-12910 $39.00 __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.

01-20-2014, 08:31 PM	#7
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,432	Re: SBC/BBC Z bar IIRC, the L6 Z-Bar is not as wide as the V8, since it uses a stand-off bracket on the engine, while the [4x4, at least] V8 uses a pivot stud that threads into the side of the block itself. I will take a tape measure outside and get actual measurements. OK, here's the dope: V8 = 7'', L6 = 5-3/4'' __________________ Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 01-20-2014 at 08:48 PM.



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