Core Support - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Super_Dave · 08-25-2015, 03:25 PM

Will this 1977 K1500 radiator core support work on a 1974 C20? I find online that it says it works on a 1975 but doesn't list the 1974. The holes below the headlights seem to be different. Some years are ovals and some are round... like below.

**old Rusty C10** · 08-25-2015, 07:40 PM

I was told that the rad support is good from 73-80 BUT I am building a 74 that came in basically as a frame and drivetrain. I threw on a 79 core support I had and the issue is that the 74 has a hood latch that opens from a single release in the grille.. the 79 came with an interior release. My cab is definitely a 74 as I have the vin plate and title and it would need to have a couple of holes drilled for the interior hood release as there is no provisions for it in the 74. if you're a decent metal guy you can prolly fab the correct piece you need for the top of the core support . The other issue is the 79 has grille mounts that bolt into the top edge of the two posts that run down the front of the core support and the 74 has brackets that mount tot he sides it appears. Im working on modifying the 79 support as we speak I will take pics and post

bmchevy1979 · 08-25-2015, 08:13 PM

The grill mounting brackets is where they are different the 73-74 middle brackets are welded to the support and the later 75-80 bolt on to keep the original grill only the outer and the center support are used and the holes have to be drilled for outer but the radiator support should be dimpled we're the brackets goes
http://67-72chevytrucks.com/vboard/s...51#post4584651

**old Rusty C10** · 08-25-2015, 09:34 PM

this is the pics of the 74 hood latch with the 79 core support also note the 74 appears to have a more concave center part of the grille support than a 79 the one sitting there in the pics is the 74

Super_Dave · 08-25-2015, 09:39 PM

Yeah, I understand now.

All I need is the main radiator support and then transfer all my existing parts over (top support, latch, headlights, etc), but I wasn't dialed in on the grill issues. I'm better off being patient and getting a clean, straight '74, making life much simpler!

Thanks guys!

KrazyRay · 08-26-2015, 09:14 AM

There was an optional inside hood release from 78-80. It takes the same core support, but the top bar is different to accommodate the inside release. You can change the top bar if you want to go with the normal outside release.

Super_Dave · 08-26-2015, 01:24 PM

Quote:

Originally Posted by KrazyRay

There was an optional inside hood release from 78-80. It takes the same core support, but the top bar is different to accommodate the inside release. You can change the top bar if you want to go with the normal outside release.

The guy decided to keep the complete core support and radiator as a package deal, so still looking.

Good information to know on the 78-80. Will keep the info handy!

08-25-2015, 03:25 PM	#1
Super_Dave Registered User Join Date: Jul 2014 Location: Sherwood, Oregon Posts: 974	Core Support Will this 1977 K1500 radiator core support work on a 1974 C20? I find online that it says it works on a 1975 but doesn't list the 1974. The holes below the headlights seem to be different. Some years are ovals and some are round... like below. Attached Images __________________ --Project BABA YAGA!... http://67-72chevytrucks.com/vboard/s...d.php?t=655783 --Project BABA YAGA!... http://67-72chevytrucks.com/vboard/s...ghlight=Belair "Life is tough - wear a cup!" "Old Enough to Know Better - Too Young to Resist" "Junk is something you will need three weeks after you throw it away."

08-25-2015, 07:40 PM	#2
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,299	Re: Core Support I was told that the rad support is good from 73-80 BUT I am building a 74 that came in basically as a frame and drivetrain. I threw on a 79 core support I had and the issue is that the 74 has a hood latch that opens from a single release in the grille.. the 79 came with an interior release. My cab is definitely a 74 as I have the vin plate and title and it would need to have a couple of holes drilled for the interior hood release as there is no provisions for it in the 74. if you're a decent metal guy you can prolly fab the correct piece you need for the top of the core support . The other issue is the 79 has grille mounts that bolt into the top edge of the two posts that run down the front of the core support and the 74 has brackets that mount tot he sides it appears. Im working on modifying the 79 support as we speak I will take pics and post __________________ 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!!

08-25-2015, 08:13 PM	#3
bmchevy1979 Registered User Join Date: Dec 2010 Location: Visalia, Ca Posts: 707	Re: Core Support The grill mounting brackets is where they are different the 73-74 middle brackets are welded to the support and the later 75-80 bolt on to keep the original grill only the outer and the center support are used and the holes have to be drilled for outer but the radiator support should be dimpled we're the brackets goes http://67-72chevytrucks.com/vboard/s...51#post4584651 __________________ <Brandon> 1974 Chevrolet K5 Blazer 350sbc/SM465/NP205, dana44 front, corp 14bolt rear with 4.10s and a powertrax locker, custom rear bumper 400sbc in the works. 1981 GMC C1500 stepside 250i6, 3spd, 12bolt with 3.08s 2.5/4drop on 15x10 with 275/50r15 81 GMC C3500 cab-chassis dually with utility bed 350sbc, Sm465, 14bolt with 4.10s nv4500 getting ready to go in 1979 Chevrolet K5 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434096 1976 Chevrolet C10 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434195 Last edited by bmchevy1979; 08-25-2015 at 08:23 PM.

08-25-2015, 09:34 PM	#4
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,299	Re: Core Support this is the pics of the 74 hood latch with the 79 core support also note the 74 appears to have a more concave center part of the grille support than a 79 the one sitting there in the pics is the 74 Attached Images __________________ 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!!

08-25-2015, 09:39 PM	#5
Super_Dave Registered User Join Date: Jul 2014 Location: Sherwood, Oregon Posts: 974	Re: Core Support Yeah, I understand now. All I need is the main radiator support and then transfer all my existing parts over (top support, latch, headlights, etc), but I wasn't dialed in on the grill issues. I'm better off being patient and getting a clean, straight '74, making life much simpler! Thanks guys! __________________ --Project BABA YAGA!... http://67-72chevytrucks.com/vboard/s...d.php?t=655783 --Project BABA YAGA!... http://67-72chevytrucks.com/vboard/s...ghlight=Belair "Life is tough - wear a cup!" "Old Enough to Know Better - Too Young to Resist" "Junk is something you will need three weeks after you throw it away."

08-26-2015, 09:14 AM	#6
KrazyRay Registered User Join Date: Jun 2009 Location: Oroville, CA Posts: 4,827	Re: Core Support There was an optional inside hood release from 78-80. It takes the same core support, but the top bar is different to accommodate the inside release. You can change the top bar if you want to go with the normal outside release.



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