SBC with clutch fan and a fan shroud from a 307

565bbchevy

565bbchevy

Geezer
Aug 8, 2011
6,376
113
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

TURNA

Geezer
Jul 24, 2009
8,197
113
Socialist NY
I know a couple of people using the Cutlass style shroud without issue
 
Texas82GP

Texas82GP

Comic Book Super Hero
Supporting Member
Apr 3, 2015
4,904
113
Spring, Texas
SOME Canadian Cutlasses came with a SBC stock. I wonder what shroud they used stock?
 
R

RestoMod

Not-quite-so-new-guy
Apr 7, 2019
15
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

Rktpwrd

Royal Smart Person
Feb 2, 2015
2,144
113
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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RestoMod

Not-quite-so-new-guy
Apr 7, 2019
15
3
Measure the depth of the two see what you come up with ....
 
565bbchevy

565bbchevy

Geezer
Aug 8, 2011
6,376
113
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

Kwik_Cutty88

Moderator
Moderator
Nov 22, 2011
1,109
83
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
 
Tuffregal83

Tuffregal83

Master Mechanic
Mar 30, 2016
304
63
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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