'68 c30 power brake question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

projectking · 08-10-2016, 09:07 AM

http://m.ebay.com/itm/67-68-69-70-71...257Ciid%253A10

Is this all I need to swap out my manual drum master cyl or is there more linkage involved?

projectking · 08-10-2016, 04:10 PM

I know there isn't a prop valve with it and only wondering if the bracket and rod pictured is all that is needed.

**kwmech** · 08-10-2016, 04:21 PM

Do you have all the brackets and linkage that bolt to the firewall? AND that 10 series stuff isn't going to work on your 1 ton.

projectking · 08-10-2016, 05:31 PM

The link has a bracket pictured, I currently have a manual master.

**kwmech** · 08-10-2016, 06:05 PM

Brackets look correct. Don't need combo/prop valve unless swapping to disc on the front. You can retain the stock piece

projectking · 08-10-2016, 07:15 PM

Thanks! I have disks up front from an '84, I'll have to source a kit with the larger booster then.

**kwmech** · 08-10-2016, 07:20 PM

Do you have the proportioning valve from the 84?

projectking · 08-10-2016, 07:51 PM

No, I only bought the frame and front suspension.

projectking · 08-10-2016, 07:58 PM

I found a kit with an 11" booster, that's the c20/c30 diameter right?

**kwmech** · 08-10-2016, 11:11 PM

Quote:

Originally Posted by projectking

No, I only bought the frame and front suspension.

It may be on the front cross member near where the steering box was bolted

projectking · 08-11-2016, 05:34 AM

I think you might be right, luckily I still have the front stub.

08-10-2016, 09:07 AM	#1
projectking Registered User Join Date: Oct 2006 Location: Orland Park Il Posts: 2,041	'68 c30 power brake question http://m.ebay.com/itm/67-68-69-70-71...257Ciid%253A10 Is this all I need to swap out my manual drum master cyl or is there more linkage involved? __________________ 68 GMC C3500 Longhorn DRW 67 Chevy C10 LWB 90 Mustang Gt 90 Mustang Notchback

08-10-2016, 04:10 PM	#2
projectking Registered User Join Date: Oct 2006 Location: Orland Park Il Posts: 2,041	Re: '68 c30 power brake question I know there isn't a prop valve with it and only wondering if the bracket and rod pictured is all that is needed. __________________ 68 GMC C3500 Longhorn DRW 67 Chevy C10 LWB 90 Mustang Gt 90 Mustang Notchback

08-10-2016, 04:21 PM	#3
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,397	Re: '68 c30 power brake question Do you have all the brackets and linkage that bolt to the firewall? AND that 10 series stuff isn't going to work on your 1 ton.

08-10-2016, 05:31 PM	#4
projectking Registered User Join Date: Oct 2006 Location: Orland Park Il Posts: 2,041	Re: '68 c30 power brake question The link has a bracket pictured, I currently have a manual master. __________________ 68 GMC C3500 Longhorn DRW 67 Chevy C10 LWB 90 Mustang Gt 90 Mustang Notchback

08-10-2016, 06:05 PM	#5
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,397	Re: '68 c30 power brake question Brackets look correct. Don't need combo/prop valve unless swapping to disc on the front. You can retain the stock piece

08-10-2016, 07:15 PM	#6
projectking Registered User Join Date: Oct 2006 Location: Orland Park Il Posts: 2,041	Re: '68 c30 power brake question Thanks! I have disks up front from an '84, I'll have to source a kit with the larger booster then. __________________ 68 GMC C3500 Longhorn DRW 67 Chevy C10 LWB 90 Mustang Gt 90 Mustang Notchback

08-10-2016, 07:20 PM	#7
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,397	Re: '68 c30 power brake question Do you have the proportioning valve from the 84?

08-10-2016, 07:51 PM	#8
projectking Registered User Join Date: Oct 2006 Location: Orland Park Il Posts: 2,041	Re: '68 c30 power brake question No, I only bought the frame and front suspension. __________________ 68 GMC C3500 Longhorn DRW 67 Chevy C10 LWB 90 Mustang Gt 90 Mustang Notchback

08-10-2016, 07:58 PM	#9
projectking Registered User Join Date: Oct 2006 Location: Orland Park Il Posts: 2,041	Re: '68 c30 power brake question I found a kit with an 11" booster, that's the c20/c30 diameter right? __________________ 68 GMC C3500 Longhorn DRW 67 Chevy C10 LWB 90 Mustang Gt 90 Mustang Notchback

08-11-2016, 05:34 AM	#11
projectking Registered User Join Date: Oct 2006 Location: Orland Park Il Posts: 2,041	Re: '68 c30 power brake question I think you might be right, luckily I still have the front stub. __________________ 68 GMC C3500 Longhorn DRW 67 Chevy C10 LWB 90 Mustang Gt 90 Mustang Notchback



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