The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 12-19-2009, 12:05 AM   #1
68C15
blood type; Retumbo
 
68C15's Avatar
 
Join Date: Jan 2004
Location: next to my reloading bench
Posts: 10,269
non-AC heater on an AC cab

a guy I know (my old neighbor) needs heat. the evaporator box is missing. I think I have a regular heater box I can give him but I need to know if it will fit.

BTW, it is either a 69 or 70, not sure which one though.
68C15 is offline   Reply With Quote
Old 12-19-2009, 01:06 AM   #2
LockDoc
The Older Generation


 
LockDoc's Avatar
 
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,772
Re: non-AC heater on an AC cab

-
I don't think so but I have never really tried it... I know the openings in the firewall are different and the heater core is inside the cab on the A/C.

LockDoc
__________________
Leon

Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles

(My Dually Pickup Project Thread)

http://67-72chevytrucks.com/vboard/s...d.php?t=829820

-
LockDoc is offline   Reply With Quote
Old 12-19-2009, 01:24 AM   #3
clay68c10
Senior Member
 
clay68c10's Avatar
 
Join Date: Aug 2004
Location: Centennial, CO
Posts: 2,990
Re: non-AC heater on an AC cab

Yup, boxes/openings are different and the core is inside. Someone makes a bypass duct, but maybe a guy could come up with something at home in a pinch. You just need air to flow from one opening to the other on the firewall.

Here's a link:
http://www.acdelete.com/pages/67-72_Truck.htm
__________________
ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO
http://67-72chevytrucks.com/vboard/s...d.php?t=788602
93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday...
05 Jeep Wrangler Unlimited. 3” lift & 6-speed
02 E320 the insurance total “free car”
13 Tahoe LTZ

Last edited by clay68c10; 12-19-2009 at 01:27 AM.
clay68c10 is offline   Reply With Quote
Old 12-19-2009, 11:43 AM   #4
mrein3
Registered User
 
mrein3's Avatar
 
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
Re: non-AC heater on an AC cab

Quote:
Originally Posted by 68C15 View Post
a guy I know (my old neighbor) needs heat. the evaporator box is missing. I think I have a regular heater box I can give him but I need to know if it will fit.

BTW, it is either a 69 or 70, not sure which one though.
If you have an afternoon to kill it might be worth a shot.

I would plug the heater hose holes with a fabbed up plate. Then I would attempt to cover the part of the AC hole furthest from the tranny tunnel that isn't covered by the heater box. This piece might be the same plate to cover the AC style heater core holes. Then bolt on the non-AC heater box. You'll have limited heat flow through the firewall but limited heat is better than no heat at all.

If you are doing it permant like you can use the parts you got to make sheet metal pieces you can weld in the firewall. A few years ago I went the other way making my non-AC cab work with factory AC parts.

You make paper templates by rubbing a pencil on the firewall and the heater box. I marked up the famous AC vs. non-AC firewall picture to help with lining stuff up. You simply need to do the inverse of what my marked up picture states. Cut out what I welded in, and make and weld in what I cut out. Make sense?

I'd try it first with a simple sheet metal plate roughly covering the AC opening.
Attached Images
     
__________________
'70 cab, '71 chassis, 383, TH350, NP205.
'71 Malibu convertible
'72 Malibu hard top
Center City, MN
mrein3 is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 09:19 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com