Fan shroud 1977 engine swap into 69 gmc 1/2t 2wd - The 1947 - Present Chevrolet & GMC Truck Message Board Network

andrewpclayton · 05-17-2019, 02:26 AM

The shroud I had from my 307 non ac 69 gmc 1/2t won’t fit with the 77 engine and fan set up. Old was short water pump now it’s long..

can this be solved with a new shroud?
Does anyone know what wil fit?
Or do I need a new fan or should I just go with electric fans?

Thanks everyone

rjs53 · 05-17-2019, 07:08 AM

Can't imagine an inch or so making that big a difference. Will the fan from the 307 work on the new motor?

Markuli · 05-17-2019, 07:34 AM

If the shroud isn't a "show piece" you can always "egg" the holes and put a washer between the shroud and the screw head, then set the shroud where you want. That's what I had to do with mine.

This is assuming the water pump is the issue and not the fan diameter.

I went to a clutch fan which is definitely from a later model, and my shroud worked with a little adjustment. I did use a short water pump in both applications though.

**Ol Blue K20** · 05-17-2019, 07:40 AM

Pics would help a lot...

Mike C · 05-17-2019, 08:01 AM

If the original engine and accessory drive pieces were in the truck when you got it, why would you not go back with all of those pieces?

In the future, either you are a different care taker will be unhappy that you switched front the SWP setup. And besides, that will fix any shroud/fan issues that were created by move to LWP pieces.

weim55 · 05-17-2019, 09:55 AM

[QUOTE=Mike C;8527023]If the original engine and accessory drive pieces were in the truck when you got it, why would you not go back with all of those pieces?

In the future, either you are a different care taker will be unhappy that you switched front the SWP setup. And besides, that will fix any shroud/fan issues that were created by move to LWP pieces.[/QUOTE

What he said. No reason to change over to the long style pump ,just retain all of your original accessory drive from the 307 and your problems are solved. And yes the short style pump will take a clutch drive fan as well.

Steve weim55 Colorado

andrewpclayton · 05-17-2019, 10:07 AM

I didn’t foresee this issue and I disposed of the original motor a few months ago..

weim55 · 05-17-2019, 01:05 PM

Personally I would just pay the money and purchase all the correct components on the used parts board here on the forums and put it back to stock. For future parts replacement everything will be correct to the truck and zero fittiment issues whatsoever. I’ll go one step further and say it even helps the resale value of the truck. When I’m looking at one of these trucks for sale it’s a real notch up to see under the hood and components are original and unaltered.

Steve weim55 Colorado

05-17-2019, 02:26 AM	#1
andrewpclayton Registered User Join Date: Aug 2017 Location: Eugene Oregon Posts: 128	Fan shroud 1977 engine swap into 69 gmc 1/2t 2wd The shroud I had from my 307 non ac 69 gmc 1/2t won’t fit with the 77 engine and fan set up. Old was short water pump now it’s long.. can this be solved with a new shroud? Does anyone know what wil fit? Or do I need a new fan or should I just go with electric fans? Thanks everyone __________________ 1977 SWB (c20 conversion) SBC350 Springfield Oregon Instagram: @nevernotchevy

05-17-2019, 07:08 AM	#2
rjs53 Registered User Join Date: Jan 2010 Location: nevada Posts: 649	Re: Fan shroud 1977 engine swap into 69 gmc 1/2t 2wd Can't imagine an inch or so making that big a difference. Will the fan from the 307 work on the new motor? __________________ 2003 Dodge 2500 1969 C10 2014 Camaro SS/RS/1LE

05-17-2019, 07:34 AM	#3
Markuli Registered User Join Date: Apr 2018 Location: Riverdale, NJ Posts: 85	Re: Fan shroud 1977 engine swap into 69 gmc 1/2t 2wd If the shroud isn't a "show piece" you can always "egg" the holes and put a washer between the shroud and the screw head, then set the shroud where you want. That's what I had to do with mine. This is assuming the water pump is the issue and not the fan diameter. I went to a clutch fan which is definitely from a later model, and my shroud worked with a little adjustment. I did use a short water pump in both applications though.

05-17-2019, 07:40 AM	#4
Ol Blue K20 Proprietor of Dale's Corner Join Date: Nov 2012 Location: Vacaville , CA Posts: 15,873	Re: Fan shroud 1977 engine swap into 69 gmc 1/2t 2wd Pics would help a lot... __________________ "Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man

05-17-2019, 08:01 AM	#5
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,714	Re: Fan shroud 1977 engine swap into 69 gmc 1/2t 2wd If the original engine and accessory drive pieces were in the truck when you got it, why would you not go back with all of those pieces? In the future, either you are a different care taker will be unhappy that you switched front the SWP setup. And besides, that will fix any shroud/fan issues that were created by move to LWP pieces. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

05-17-2019, 09:55 AM	#6
weim55 Registered User Join Date: Jan 2017 Location: Larkspur, Colorado Posts: 904	Re: Fan shroud 1977 engine swap into 69 gmc 1/2t 2wd [QUOTE=Mike C;8527023]If the original engine and accessory drive pieces were in the truck when you got it, why would you not go back with all of those pieces? In the future, either you are a different care taker will be unhappy that you switched front the SWP setup. And besides, that will fix any shroud/fan issues that were created by move to LWP pieces.[/QUOTE What he said. No reason to change over to the long style pump ,just retain all of your original accessory drive from the 307 and your problems are solved. And yes the short style pump will take a clutch drive fan as well. Steve weim55 Colorado

05-17-2019, 10:07 AM	#7
andrewpclayton Registered User Join Date: Aug 2017 Location: Eugene Oregon Posts: 128	Re: Fan shroud 1977 engine swap into 69 gmc 1/2t 2wd I didn’t foresee this issue and I disposed of the original motor a few months ago.. __________________ 1977 SWB (c20 conversion) SBC350 Springfield Oregon Instagram: @nevernotchevy

05-17-2019, 01:05 PM	#8
weim55 Registered User Join Date: Jan 2017 Location: Larkspur, Colorado Posts: 904	Re: Fan shroud 1977 engine swap into 69 gmc 1/2t 2wd Personally I would just pay the money and purchase all the correct components on the used parts board here on the forums and put it back to stock. For future parts replacement everything will be correct to the truck and zero fittiment issues whatsoever. I’ll go one step further and say it even helps the resale value of the truck. When I’m looking at one of these trucks for sale it’s a real notch up to see under the hood and components are original and unaltered. Steve weim55 Colorado



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