Can I get some EXPLICIT steps on doing an AC delete? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

projo198 · 01-14-2025, 05:32 PM

I've been trying to get a solid answer online and have had no luck.

My '78 K10 came to me with the outer heater box completely tore off. The only thing still there was the blower motor and housing.

I want to run heat only, no interest in restoring the AC (if it ever existed). The controls in the cab do show AC selections so I am guessing at one time it had it.

I have seen aftermarket "AC delete" boxes which appear to just connect the blower motor with the large square door in the firewall. I am in the process of fabbing my own to save money.

Is this job literally that simple? Does it require any modifications inside the cab?

Pic of my firewall. Any help/advice would be appreciated!

**old Rusty C10** · 01-15-2025, 10:58 AM

thats where the blower motor sits the pic in this ebay sale shows the shape of the outside box https://www.ebay.com/itm/186290728350

projo198 · 01-15-2025, 12:55 PM

Delete

Pontiac1976 · 01-20-2025, 05:25 AM

If you're going to run a heater core the lines(tubs) are in a different place then the A/c lines. Weld in the big hole move the tube closer to the big hole.
Go wrecker 77-80 remove the non-A/c heater housing under dash and engine bay and heater core fire wall wiring resister and the heater temp switch and the wire rods for the flapper doors.

Pontiac1976 · 01-20-2025, 05:41 AM

This is a none A/c fire wall see the difference. If your not going to put in a heater core just weld both holes. no heat for in the truck or for the windshield early morning or late-night drives.

projo198 · 01-22-2025, 02:58 PM

Thanks guys. I finished this up over the weekend, replaced just about everything including the wiring.

01-14-2025, 05:32 PM	#1
projo198 Registered User Join Date: Jan 2025 Location: Lawson MO Posts: 7	Can I get some EXPLICIT steps on doing an AC delete? I've been trying to get a solid answer online and have had no luck. My '78 K10 came to me with the outer heater box completely tore off. The only thing still there was the blower motor and housing. I want to run heat only, no interest in restoring the AC (if it ever existed). The controls in the cab do show AC selections so I am guessing at one time it had it. I have seen aftermarket "AC delete" boxes which appear to just connect the blower motor with the large square door in the firewall. I am in the process of fabbing my own to save money. Is this job literally that simple? Does it require any modifications inside the cab? Pic of my firewall. Any help/advice would be appreciated!

01-15-2025, 10:58 AM	#2
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,326	Re: Can I get some EXPLICIT steps on doing an AC delete? thats where the blower motor sits the pic in this ebay sale shows the shape of the outside box https://www.ebay.com/itm/186290728350 __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

01-15-2025, 12:55 PM	#3
projo198 Registered User Join Date: Jan 2025 Location: Lawson MO Posts: 7	Re: Can I get some EXPLICIT steps on doing an AC delete? Delete Last edited by projo198; 01-15-2025 at 03:56 PM. Reason: User deleted

01-20-2025, 05:25 AM	#4
Pontiac1976 Registered User Join Date: Oct 2015 Location: Ottawa, Ontario, Canada Posts: 775	Re: Can I get some EXPLICIT steps on doing an AC delete? If you're going to run a heater core the lines(tubs) are in a different place then the A/c lines. Weld in the big hole move the tube closer to the big hole. Go wrecker 77-80 remove the non-A/c heater housing under dash and engine bay and heater core fire wall wiring resister and the heater temp switch and the wire rods for the flapper doors. __________________ 1977 REG cab Long Bed with a 1984 Front Clip, 82 305 .60 over 9.0.1 flat top pistons, 4bbl, TH350, w/84 SS-intake & cam , w/ 1977 big block rad, 1975 gear box, 1984 master w/ metric fittings top & SAE fitting @ portion block, 1975 3.42 gear open diff. Duel 77-87 Factory air cleaner, duel inlet from rad support . Down sized 9' to new 8' Steel flat bed Was a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change.

01-20-2025, 05:41 AM	#5
Pontiac1976 Registered User Join Date: Oct 2015 Location: Ottawa, Ontario, Canada Posts: 775	Re: Can I get some EXPLICIT steps on doing an AC delete? This is a none A/c fire wall see the difference. If your not going to put in a heater core just weld both holes. no heat for in the truck or for the windshield early morning or late-night drives. __________________ 1977 REG cab Long Bed with a 1984 Front Clip, 82 305 .60 over 9.0.1 flat top pistons, 4bbl, TH350, w/84 SS-intake & cam , w/ 1977 big block rad, 1975 gear box, 1984 master w/ metric fittings top & SAE fitting @ portion block, 1975 3.42 gear open diff. Duel 77-87 Factory air cleaner, duel inlet from rad support . Down sized 9' to new 8' Steel flat bed Was a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change. Last edited by Pontiac1976; 01-20-2025 at 05:47 AM.

01-22-2025, 02:58 PM	#6
projo198 Registered User Join Date: Jan 2025 Location: Lawson MO Posts: 7	Re: Can I get some EXPLICIT steps on doing an AC delete? Thanks guys. I finished this up over the weekend, replaced just about everything including the wiring.

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