What goes on my firewall? Pictures included - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**HeloCrewChief** · 06-01-2012, 07:33 PM

I picked up a replacement cab and am confused by the holes for the master cylinder. It looks like it has a dual master cylinder hole in it? Is there an adapter plate to run power brakes with this type firewall? Also on the roof where is the two tone cut off on the 60-63 cabs at the base of the windshield? Thanks guys.

ConnDemned · 06-01-2012, 08:08 PM

The two holes are for brake and clutch master cylinders. I believe Captain Fab makes brackets for power brakes that mount to that firewall.
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markeb01 · 06-01-2012, 09:02 PM

Yes it's a 60-62 cab designed for the dual brake/clutch master cylinder. The 63 firewall is different having the mechanical clutch, and I believe the square lower heater opening is also different. As best I know the 60-62 has a cover with 4 retaining screws, while the later cover only uses 3.

**HeloCrewChief** · 06-01-2012, 11:27 PM

Thanks guys for the help. Now to find that bracket. Also, will the heater from a 63 GMC work on this cab or is it different like you said from 60-62?

**HeloCrewChief** · 06-01-2012, 11:30 PM

Just saw you guys are both from WA. Just left there in April. Was working on JBLM near Tacoma for about 7 months before taking my current job. I loved that place. I have lived all over the place but, Washington is by far one place I would not mind calling home. Rain and all!

koda360 · 06-02-2012, 06:27 AM

and yes, the colors change at the bottom of windshield (belt line). There's a small step there, however, I have seen them with just the roof a different color (above the drip rails).... Not sure if this is factory tho.

**HeloCrewChief** · 06-02-2012, 09:05 AM

koda360 I have seen them both ways as well and just was not sure exactly what way to go.

**Captainfab** · 06-03-2012, 01:00 AM

Yes, if you are wanting to put power brakes on that cab I have one for use with an auto trans and one for use with a manual trans. There are links to the for sale threads in my signature line below \/ \/ \/

Send me a PM if you are interested.

dthela · 06-10-2012, 07:46 PM

62 gmc burb

Dino Driver · 06-10-2012, 09:15 PM

My 60 has the same square hole for the heater. I sold the engine bay portion years ago but I think I have the inside the cab portion of thrust work still. The heater box is pretty much the same, it's the heater core that changes on OEM but the are generic ones available.
Posted via Mobile Device

06-01-2012, 07:33 PM	#1
HeloCrewChief Senior Member Join Date: Aug 2010 Location: North Alabama Posts: 1,056	What goes on my firewall? Pictures included I picked up a replacement cab and am confused by the holes for the master cylinder. It looks like it has a dual master cylinder hole in it? Is there an adapter plate to run power brakes with this type firewall? Also on the roof where is the two tone cut off on the 60-63 cabs at the base of the windshield? Thanks guys. Attached Images __________________ 1970 C10 to K20 conversion 1974 GMC Jimmy 1968 50th Anniversary Short Bed 1968 Chevelle 1964 Comet Caliente 1990 W250 Cummins

06-01-2012, 08:08 PM	#2
ConnDemned Registered User Join Date: Jul 2005 Location: Spanaway, WA Posts: 103	Re: What goes on my firewall? Pictures included The two holes are for brake and clutch master cylinders. I believe Captain Fab makes brackets for power brakes that mount to that firewall. Posted via Mobile Device

06-01-2012, 09:02 PM	#3
markeb01 Senior Enthusiast Join Date: Feb 2007 Location: Spokane Valley, WA Posts: 8,356	Re: What goes on my firewall? Pictures included Yes it's a 60-62 cab designed for the dual brake/clutch master cylinder. The 63 firewall is different having the mechanical clutch, and I believe the square lower heater opening is also different. As best I know the 60-62 has a cover with 4 retaining screws, while the later cover only uses 3. __________________ My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=444502

06-01-2012, 11:27 PM	#4
HeloCrewChief Senior Member Join Date: Aug 2010 Location: North Alabama Posts: 1,056	Re: What goes on my firewall? Pictures included Thanks guys for the help. Now to find that bracket. Also, will the heater from a 63 GMC work on this cab or is it different like you said from 60-62? __________________ 1970 C10 to K20 conversion 1974 GMC Jimmy 1968 50th Anniversary Short Bed 1968 Chevelle 1964 Comet Caliente 1990 W250 Cummins

06-01-2012, 11:30 PM	#5
HeloCrewChief Senior Member Join Date: Aug 2010 Location: North Alabama Posts: 1,056	Re: What goes on my firewall? Pictures included Just saw you guys are both from WA. Just left there in April. Was working on JBLM near Tacoma for about 7 months before taking my current job. I loved that place. I have lived all over the place but, Washington is by far one place I would not mind calling home. Rain and all! __________________ 1970 C10 to K20 conversion 1974 GMC Jimmy 1968 50th Anniversary Short Bed 1968 Chevelle 1964 Comet Caliente 1990 W250 Cummins

06-02-2012, 06:27 AM	#6
koda360 Registered User Join Date: Nov 2011 Location: White Cottage, Oh. Posts: 99	Re: What goes on my firewall? Pictures included and yes, the colors change at the bottom of windshield (belt line). There's a small step there, however, I have seen them with just the roof a different color (above the drip rails).... Not sure if this is factory tho. __________________ 1960 C-10 2000 Dakota R/T 1966 Fury I 2dr post 1984 Big Bronco 2002 Durango SLT (Bride's Ride)

06-02-2012, 09:05 AM	#7
HeloCrewChief Senior Member Join Date: Aug 2010 Location: North Alabama Posts: 1,056	Re: What goes on my firewall? Pictures included koda360 I have seen them both ways as well and just was not sure exactly what way to go. __________________ 1970 C10 to K20 conversion 1974 GMC Jimmy 1968 50th Anniversary Short Bed 1968 Chevelle 1964 Comet Caliente 1990 W250 Cummins

06-03-2012, 01:00 AM	#8
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: What goes on my firewall? Pictures included Yes, if you are wanting to put power brakes on that cab I have one for use with an auto trans and one for use with a manual trans. There are links to the for sale threads in my signature line below \/ \/ \/ Send me a PM if you are interested. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

06-10-2012, 07:46 PM	#9
dthela Registered User Join Date: Jul 2011 Location: N Kingstown, R.I. Posts: 305	Re: What goes on my firewall? Pictures included 62 gmc burb Attached Images

06-10-2012, 09:15 PM	#10
Dino Driver Registered User Join Date: Mar 2011 Location: Portland, Oregon Posts: 107	Re: What goes on my firewall? Pictures included My 60 has the same square hole for the heater. I sold the engine bay portion years ago but I think I have the inside the cab portion of thrust work still. The heater box is pretty much the same, it's the heater core that changes on OEM but the are generic ones available. Posted via Mobile Device __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=456437

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