SBC with clutch fan and a fan shroud from a 307

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565bbchevy

Geezer
Aug 8, 2011
9,590
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Michigan
I pulled the 307 from my Regal and will be installing a SBC and I am wondering is anyone using a fan shroud from the 307 and does the clutch fan fit centered in the shroud as far as the diameter of the fan and also does the clutch for the SBC put the blades at the correct depth for the 307 shroud?
 

TURNA

Rocket Powered Basset Hound
Jul 24, 2009
10,941
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Socialist NY
I know a couple of people using the Cutlass style shroud without issue
 

Texas82GP

Just-a-worm
Apr 3, 2015
7,981
18,676
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Spring, Texas
SOME Canadian Cutlasses came with a SBC stock. I wonder what shroud they used stock?
 

RestoMod

Not-quite-so-new-guy
Apr 7, 2019
17
14
3
Well it should work just fine, if it were a v6 car then yes it wouldn't work, 229.231 all used a deep can shroud, 307 I assume is a v8 so it'll work,_I've been wrong before but I've had a butt load of g body s in my day , skin pretty confident in this
 

Rktpwrd

Builder of Cool Shjt
Supporting Member
Feb 2, 2015
4,152
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Calgary, Alberta, Canada
Dunno if it helps, but the two shrouds are completely different animals. I can’t answer your question or speak to the depth that the sbc fan would sit in the 307 shroud, but here’s the difference between the two:

My (Canadian) car with a stock 305 sbc shroud:

C77BAD09-9348-421A-8197-3DBB0A030E84.jpeg


And an online picture I found of the sbo shroud:

74EBE7F6-40B3-4B45-AAD2-6245795A841D.jpeg


Even the way they both mount is completely different. Good luck with the search for your answer, hope this helps.
 
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565bbchevy

Geezer
Aug 8, 2011
9,590
12,612
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Michigan
I wanted to order a new clutch and a new 19" fan for the SBC since that is the size of the Olds 307 fan but if there are any issues with alignment with the Olds shroud I will need to order a smaller diameter fan.
 

Kwik_Cutty88

Royal Smart Person
Nov 22, 2011
1,173
662
113
Coastal North Carolina
I ran the Olds 307 fan shroud with a SBC clutch fan for years with no issues. From what i remember the fan was centered in the shroud, and I know for a fact it did not stick out past the shroud. I tried to see if I had a photo from the rear side so you can see the fan inside the shroud, but I didn’t have one.

DB8A42D0-76C1-4D03-8D8C-D3D17A4C8AFB.jpeg
 
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Tuffregal83

G-Body Guru
Mar 30, 2016
639
1,149
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Lockport, Il
Running a BBC in my Regal with a olds 307 fan shroud w/ 18 1/2 inch solid fan just went to the one piece was running the two piece for years never had a problem
20190421_193639.jpg
 
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