Shrouds: V-6 vs BB ?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevy_fatman · 01-16-2006, 08:34 PM

What's the difference between a V-6 and a BB one? I know that look about the same but, are the mounting tabs in the same location? the one in my V-6 has been badly cracked and been wanting to replace it, anybody knows?
Thanks.

BubbaGreen · 01-16-2006, 08:37 PM

Not sure about the opening placement, but the opening is the same diameter. However, thickness for the BB is approx 1" to 1-1/2" deeper than the V6 version.

*bisquik65* · 01-16-2006, 08:50 PM

Member Bobs is the V6 man on here....Where are you Bob?

Longhorn Man · 01-16-2006, 09:56 PM

I remember they were 99% the same. Wes knows the difference too.

**Bob B.** · 01-16-2006, 10:05 PM

Here I am. I would love to give you a straight answer, but..... Anyway, according to the 67-69 GMC parts book, some are the same between Big Block Chevy and GMC V-6. Part #3924932 is the standard shroud for '68 and '69 V-6's, including '67 305's with A/C. It also fits '69 396 V-8's. There is another V-6 shroud listed for '67 351's with A/C. That one is part #3903824, and it doesn't go on any 396 V-8's. What year and what size is your V-6? Does the shroud have a number molded in it?

chevy_fatman · 01-16-2006, 10:25 PM

Bob, that first number you posted, is it the same for '68-'69 trucks with A/C or just for '67 305 with A/C? my V-6 is a '69 305E with A/C, I haven't really looked at the shroud for a number, where should it be located?

Thanks for all the responses guys

Paul.

**Joesjunk** · 01-16-2006, 10:45 PM

I think I still have a shroud from a V-6 truck. It is different than a BB one. I think it is not as wide? I will have to dig it out again. They do "Look" the same though. I will sell it if you need one.

Longhorn Man · 01-16-2006, 11:22 PM

What you got brewin there Paul?

chevy_fatman · 01-16-2006, 11:55 PM

Quote:

Originally Posted by Longhorn Man

What you got brewin there Paul?

shhhh! don't wanna let the cat outta the bag

when you going to kali?

Bob Moore · 01-17-2006, 12:23 AM

If you look on top of the core support on the passenger side(battery side) you will notice a captured nut location 2inches toward the center line from the standard radiator holddown location. This is for the GMC V6 radiator and narrow shroud. The shroud is the same in appearance to the big block shroud except it has 2 inches off the passenger side - fan diameter is the same and same location as BB. I just looked at 1 in my basement and measured the difference. The lower edge of the core support also has a provision for the lower holddown location 2 inches from the standard. I believe the V6 shroud would work with either a four core or standard radiator if it was 2 inches narrower.

Let me know if you need pictures or the shroud - Bob

**Bob B.** · 01-17-2006, 01:50 AM

3924932 also fits 1/2 ton '68 and '69 305's with A/C, too. The numbers on my shroud are molded in the edge of the fan opening at the bottom. My shroud (3903824) is wide, and the radiator/shroud brackets go in the outer captured nuts on the core support. I have the inboard nut that Bob Moore is talking about, but it is not used.

BobS · 01-17-2006, 10:42 AM

The V-6s usually have smaller radiators, it's hard to get them to run warm enough to keep the frost off the windows up here with a big radiator!

Bob

Erl · 01-17-2006, 02:15 PM

There were two sizes used on the GMC V6, a small one and a large one. The large one is part # 3924932 (as stated earlier), the same as 69 big block. The part number is molded into the shroud. It is small and hard to find. Bought one from Wes and it bolted right in.
Erl

Bob Moore · 01-17-2006, 03:12 PM

Yes. Mine is the correct smaller one, for the smaller radiator.

chevy_fatman · 01-17-2006, 08:05 PM

Thanks guys! very informative replies, I appreciate it!

Longhorn Man · 01-17-2006, 08:35 PM

Paul, a trip is planned for the begining of april.

matthufham · 01-17-2006, 09:21 PM

wow we had a bob moore, a bob b, and a bob s. sorry, onto the discussion now.

**Bob B.** · 01-17-2006, 09:49 PM

Yeah, and we are all GMC V-6 fans. What are the odds?

JAKES 68GMC · 01-17-2006, 10:05 PM

Don't forget v6 fan #4!!!!!

**Bob B.** · 01-18-2006, 04:29 AM

So it's 3 Bobs and a Jake. I'm good with that!

**Joesjunk** · 01-20-2006, 08:04 PM

I found mine, It has a part # 3903752. It is very nice if you need one. I can get a pic if you need it.

**Joesjunk** · 01-22-2006, 10:30 PM

Checking to see if you still need it. I have someone else asking if you pass.
Thanks, Joe

01-16-2006, 08:34 PM	#1
chevy_fatman Where's my beer? Join Date: Aug 2002 Location: I live in the state of denial.... Posts: 5,620	Shrouds: V-6 vs BB ?? What's the difference between a V-6 and a BB one? I know that look about the same but, are the mounting tabs in the same location? the one in my V-6 has been badly cracked and been wanting to replace it, anybody knows? Thanks. __________________ Paul How do you make the invisible, visible?.........You take it away.

01-16-2006, 08:37 PM	#2
BubbaGreen Senior Member Join Date: Mar 2001 Location: Cedar Park, TX Posts: 686	Re: Shrouds: V-6 vs BB ?? Not sure about the opening placement, but the opening is the same diameter. However, thickness for the BB is approx 1" to 1-1/2" deeper than the V6 version. __________________ 71 Chevy C-10 SWB Fleetside RamJet-350/4L60e & Compushift/3.73Posi See it at www.prismnet.com/~grzanich

01-16-2006, 10:05 PM	#5
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,363	Re: Shrouds: V-6 vs BB ?? Here I am. I would love to give you a straight answer, but..... Anyway, according to the 67-69 GMC parts book, some are the same between Big Block Chevy and GMC V-6. Part #3924932 is the standard shroud for '68 and '69 V-6's, including '67 305's with A/C. It also fits '69 396 V-8's. There is another V-6 shroud listed for '67 351's with A/C. That one is part #3903824, and it doesn't go on any 396 V-8's. What year and what size is your V-6? Does the shroud have a number molded in it? __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.

01-16-2006, 10:25 PM	#6
chevy_fatman Where's my beer? Join Date: Aug 2002 Location: I live in the state of denial.... Posts: 5,620	Re: Shrouds: V-6 vs BB ?? Bob, that first number you posted, is it the same for '68-'69 trucks with A/C or just for '67 305 with A/C? my V-6 is a '69 305E with A/C, I haven't really looked at the shroud for a number, where should it be located? Thanks for all the responses guys Paul. __________________ Paul How do you make the invisible, visible?.........You take it away.

01-16-2006, 10:45 PM	#7
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,705	Re: Shrouds: V-6 vs BB ?? I think I still have a shroud from a V-6 truck. It is different than a BB one. I think it is not as wide? I will have to dig it out again. They do "Look" the same though. I will sell it if you need one. __________________ 72 3/4t Custom Deluxe 402/auto 66k Original paint 71 3/4t 4x4 Custom Deluxe 10k original miles Original paint 71 3/4t Cheyenne 402 70k original paint 72 3/4t 4x4 Custom deluxe 72 3/4t 4x4 Custom deluxe 91k original paint 72 Cheyenne/30 Dually 69 Camaro SS396 4-speed 13 GMC 2500HD Duramax I bought new 05 Jeep Wrangler "Willys Edition" 12k miles (I bought new) 85 3/4 ton 4x4 Scottsdale 33k miles original paint 86 1 ton 4x4 SRW Silverado 454 restored 80 1 ton 4x4 SRW Silverado 9,434 original miles!! original paint 95 GMC 1 ton dually 4x4 my dad bought new 95 GMC 3/4 ton 4x4, regular cab 454, 31k original miles 2002 2500HD 4x4 regular cab 6.0L 67k miles 2002 2500HD 4x4 regular cab 8.1L 28k miles 2003 GMC 2500HD 4x4 regular cab Diesel 93k miles 67-72 Parts for sale

01-16-2006, 08:50 PM	#3
bisquik65 Account Suspended Join Date: Apr 2004 Location: N.C. high country Posts: 6,107	Re: Shrouds: V-6 vs BB ?? Member Bobs is the V6 man on here....Where are you Bob?

01-16-2006, 09:56 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Shrouds: V-6 vs BB ?? I remember they were 99% the same. Wes knows the difference too.

01-16-2006, 11:22 PM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Shrouds: V-6 vs BB ?? What you got brewin there Paul?

01-17-2006, 12:23 AM	#10
Bob Moore Registered User Join Date: Feb 2004 Location: Tacoma WA Posts: 1,365	Re: Shrouds: V-6 vs BB ?? If you look on top of the core support on the passenger side(battery side) you will notice a captured nut location 2inches toward the center line from the standard radiator holddown location. This is for the GMC V6 radiator and narrow shroud. The shroud is the same in appearance to the big block shroud except it has 2 inches off the passenger side - fan diameter is the same and same location as BB. I just looked at 1 in my basement and measured the difference. The lower edge of the core support also has a provision for the lower holddown location 2 inches from the standard. I believe the V6 shroud would work with either a four core or standard radiator if it was 2 inches narrower. Let me know if you need pictures or the shroud - Bob __________________ 67 C-20 LWB, tilt, speed alert, vac, 454, T400 67 C-10 SWB, factory air with more to follow

01-17-2006, 01:50 AM	#11
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,363	Re: Shrouds: V-6 vs BB ?? 3924932 also fits 1/2 ton '68 and '69 305's with A/C, too. The numbers on my shroud are molded in the edge of the fan opening at the bottom. My shroud (3903824) is wide, and the radiator/shroud brackets go in the outer captured nuts on the core support. I have the inboard nut that Bob Moore is talking about, but it is not used. __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.

01-17-2006, 10:42 AM	#12
BobS Senior Member Join Date: May 2001 Location: West Central Minnesota Posts: 568	Re: Shrouds: V-6 vs BB ?? The V-6s usually have smaller radiators, it's hard to get them to run warm enough to keep the frost off the windows up here with a big radiator! Bob __________________ V-6....only GMC Trucks have it! 62 GMC W5000 NAPCO-V6 65 GMC 2500 NAPCO Panel-V6 66 GMC 1000-V6 66 GMC 1500-V6 67 GMC K1500-SBC (originally a KM-V6) 68 GMC C1500-V6 68 GMC C1500-V6 68 GMC Suburban C2500 70 Chevy K20-SBC 71 Chevy C30 Longhorn-SBC 72 GMC Suburban C1500-BBC 72 Chevy C10-SBC 72 GMC C5500-ToroFlow Diesel

01-17-2006, 02:15 PM	#13
Erl Registered User Join Date: Mar 2002 Location: Dallas, TX Posts: 555	Re: Shrouds: V-6 vs BB ?? There were two sizes used on the GMC V6, a small one and a large one. The large one is part # 3924932 (as stated earlier), the same as 69 big block. The part number is molded into the shroud. It is small and hard to find. Bought one from Wes and it bolted right in. Erl __________________ 1968 GMC 305 V6 3/4 4x4 Stepside 06 Corvette Daily Driver Dallas TX

01-17-2006, 03:12 PM	#14
Bob Moore Registered User Join Date: Feb 2004 Location: Tacoma WA Posts: 1,365	Re: Shrouds: V-6 vs BB ?? Yes. Mine is the correct smaller one, for the smaller radiator. __________________ 67 C-20 LWB, tilt, speed alert, vac, 454, T400 67 C-10 SWB, factory air with more to follow

01-17-2006, 08:05 PM	#15
chevy_fatman Where's my beer? Join Date: Aug 2002 Location: I live in the state of denial.... Posts: 5,620	Re: Shrouds: V-6 vs BB ?? Thanks guys! very informative replies, I appreciate it!

01-17-2006, 08:35 PM	#16
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Shrouds: V-6 vs BB ?? Paul, a trip is planned for the begining of april.



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01-17-2006, 09:21 PM	#17
matthufham Registered User Join Date: Feb 2005 Location: Carl Junction, Missouri Posts: 2,061	Re: Shrouds: V-6 vs BB ?? wow we had a bob moore, a bob b, and a bob s. sorry, onto the discussion now.

01-17-2006, 09:49 PM	#18
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,363	Re: Shrouds: V-6 vs BB ?? Yeah, and we are all GMC V-6 fans. What are the odds? __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.

01-17-2006, 10:05 PM	#19
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,211	Re: Shrouds: V-6 vs BB ?? Don't forget v6 fan #4!!!!!

01-18-2006, 04:29 AM	#20
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,363	Re: Shrouds: V-6 vs BB ?? So it's 3 Bobs and a Jake. I'm good with that! __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.

01-20-2006, 08:04 PM	#21
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,705	Re: Shrouds: V-6 vs BB ?? I found mine, It has a part # 3903752. It is very nice if you need one. I can get a pic if you need it. __________________ 72 3/4t Custom Deluxe 402/auto 66k Original paint 71 3/4t 4x4 Custom Deluxe 10k original miles Original paint 71 3/4t Cheyenne 402 70k original paint 72 3/4t 4x4 Custom deluxe 72 3/4t 4x4 Custom deluxe 91k original paint 72 Cheyenne/30 Dually 69 Camaro SS396 4-speed 13 GMC 2500HD Duramax I bought new 05 Jeep Wrangler "Willys Edition" 12k miles (I bought new) 85 3/4 ton 4x4 Scottsdale 33k miles original paint 86 1 ton 4x4 SRW Silverado 454 restored 80 1 ton 4x4 SRW Silverado 9,434 original miles!! original paint 95 GMC 1 ton dually 4x4 my dad bought new 95 GMC 3/4 ton 4x4, regular cab 454, 31k original miles 2002 2500HD 4x4 regular cab 6.0L 67k miles 2002 2500HD 4x4 regular cab 8.1L 28k miles 2003 GMC 2500HD 4x4 regular cab Diesel 93k miles 67-72 Parts for sale

01-22-2006, 10:30 PM	#22
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,705	Re: Shrouds: V-6 vs BB ?? Checking to see if you still need it. I have someone else asking if you pass. Thanks, Joe __________________ 72 3/4t Custom Deluxe 402/auto 66k Original paint 71 3/4t 4x4 Custom Deluxe 10k original miles Original paint 71 3/4t Cheyenne 402 70k original paint 72 3/4t 4x4 Custom deluxe 72 3/4t 4x4 Custom deluxe 91k original paint 72 Cheyenne/30 Dually 69 Camaro SS396 4-speed 13 GMC 2500HD Duramax I bought new 05 Jeep Wrangler "Willys Edition" 12k miles (I bought new) 85 3/4 ton 4x4 Scottsdale 33k miles original paint 86 1 ton 4x4 SRW Silverado 454 restored 80 1 ton 4x4 SRW Silverado 9,434 original miles!! original paint 95 GMC 1 ton dually 4x4 my dad bought new 95 GMC 3/4 ton 4x4, regular cab 454, 31k original miles 2002 2500HD 4x4 regular cab 6.0L 67k miles 2002 2500HD 4x4 regular cab 8.1L 28k miles 2003 GMC 2500HD 4x4 regular cab Diesel 93k miles 67-72 Parts for sale

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