What did you buy for your G body today? [2021]

Status
Not open for further replies.

scoti

Royal Smart Person
Supporting Member
Sep 5, 2019
1,939
3,333
113
Texas
See if a diesel truck fan clutch is closer. Is the motor sitting that far back? The 455 I had in my 78’ 442 had a 74’ Delta 88 fan clutch and sat right inside the shroud. Have to see if I have any old pictures of the motor.
Stock sbc location, stock 1978 GM accessory brackets, & long water-pump.

I should not have tossed the old parts w/o looking for a possible p/n on the clutch. The fan was just a 5-blade unit so I wanted to upgrade to one w/7-blades & the clutch had play. I assumed it was just an OE fan clutch so I scrapped both parts into the metal bin @ my work. According to others that have done the swap from the Chevy 2pc (1pc upper; 1pc lower) plastic shroud to the Olds 1pc plastic shroud w/the metal top plate they align the same. My original shroud was busted up & tossed in the trash when I started cleaning up things underhood so I can't compare them either.
 

Ugly1

Royal Smart Person
Oct 26, 2021
1,559
1,288
113
Lost in the woods of NH
Stock sbc location, stock 1978 GM accessory brackets, & long water-pump.

I should not have tossed the old parts w/o looking for a possible p/n on the clutch. The fan was just a 5-blade unit so I wanted to upgrade to one w/7-blades & the clutch had play. I assumed it was just an OE fan clutch so I scrapped both parts into the metal bin @ my work. According to others that have done the swap from the Chevy 2pc (1pc upper; 1pc lower) plastic shroud to the Olds 1pc plastic shroud w/the metal top plate they align the same. My original shroud was busted up & tossed in the trash when I started cleaning up things underhood so I can't compare them either.
Bummer, I’ve done that way to many times over the years. The fan usually sit half to 3/4 of the way into the shroud as a norm.
 

565bbchevy

Geezer
Aug 8, 2011
9,559
12,521
113
Michigan
Stock sbc location, stock 1978 GM accessory brackets, & long water-pump.

I should not have tossed the old parts w/o looking for a possible p/n on the clutch. The fan was just a 5-blade unit so I wanted to upgrade to one w/7-blades & the clutch had play. I assumed it was just an OE fan clutch so I scrapped both parts into the metal bin @ my work. According to others that have done the swap from the Chevy 2pc (1pc upper; 1pc lower) plastic shroud to the Olds 1pc plastic shroud w/the metal top plate they align the same. My original shroud was busted up & tossed in the trash when I started cleaning up things underhood so I can't compare them either.
When I installed the SBC in my Regal in place of the Olds 307 I bought a new heavy duty clutch and a 7 blade fan with aluminum blades and found it needed to go another inch in the shroud and ended up buying a 1" billet aluminum spacer to get it done.
This has worked great for a few years now but I recently just changed over to a big Griffen radiator and Intrepid dual fans and can't even use the top plate.
IMG_20200711_191811688 (1).jpg
 
  • Like
  • Useful
Reactions: 2 users

scoti

Royal Smart Person
Supporting Member
Sep 5, 2019
1,939
3,333
113
Texas
When I installed the SBC in my Regal in place of the Olds 307 I bought a new heavy duty clutch and a 7 blade fan with aluminum blades and found it needed to go another inch in the shroud and ended up buying a 1" billet aluminum spacer to get it done.
This has worked great for a few years now but I recently just changed over to a big Griffen radiator and Intrepid dual fans and can't even use the top plate.
View attachment 189395
Looking @ your image, this is how I feel the depth should be. It appears the fan blade is completely under the extended upper portion & about 50% depth into the opening that's under that extended portion. When I started, mine was exposed top & sides. Now I'm about .750" out @ the top & the blades are basically flush w/the lower section vs. being partially within the opening.

A spacer is on my radar but I was trying to source a clutch unit that wouldn't require one if possible first.
 

Attachments

  • 20211230_193858.jpg
    20211230_193858.jpg
    39.5 KB · Views: 74
  • 20211230_194031.jpg
    20211230_194031.jpg
    48.8 KB · Views: 74
  • 20211230_194130.jpg
    20211230_194130.jpg
    57.6 KB · Views: 83
  • 20211230_194203.jpg
    20211230_194203.jpg
    56.9 KB · Views: 82
  • 20211230_194943.jpg
    20211230_194943.jpg
    35.7 KB · Views: 81
  • 20211230_195028.jpg
    20211230_195028.jpg
    54.7 KB · Views: 87
  • 20211230_195114.jpg
    20211230_195114.jpg
    43.8 KB · Views: 82
  • 20211230_195152.jpg
    20211230_195152.jpg
    42.9 KB · Views: 77
Last edited:
  • Winner
Reactions: 1 user

565bbchevy

Geezer
Aug 8, 2011
9,559
12,521
113
Michigan
I was going for blades to be about halfway in the main part of the shroud, I didn't have a SBC shroud for comparison but I feel the spacer would have not been needed if I used one.
 

scoti

Royal Smart Person
Supporting Member
Sep 5, 2019
1,939
3,333
113
Texas
I was going for blades to be about halfway in the main part of the shroud, I didn't have a SBC shroud for comparison but I feel the spacer would have not been needed if I used one.
That #2731 clutch has me positioned the deepest within that shroud thus far. A 1" spacer prob gets me to the depth needed & will likely be the way I get there.
 
  • Like
Reactions: 1 users
Status
Not open for further replies.

GBodyForum is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates.

Please support GBodyForum Sponsors

Classic Truck Consoles Dixie Restoration Depot UMI Performance

Contact [email protected] for info on becoming a sponsor