Question on mm clam shells - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**ScottH** · 04-20-2005, 11:34 AM

I have a set of 72 BB motor mounts that I plan on installing in a 68.
However the mm did not come with the clam shells. I've picked up a couple of sets but have noticed some differences.

Can anyone tell me if the BB clam shells were unique, different, whatever than other clam shells? If so what are the differences or what should I be looking for?

Many thanks to all the helpful folks on this outstanding site.

Scott

meathead95 · 04-20-2005, 03:51 PM

i have a set of 1968-1971 nos bbc frame mounts ill trade yah for your 72's

**ScottH** · 04-21-2005, 03:35 PM

MH95, thanks for the offer but gonna go with the 72 mounts.

Anyone have any info regarding the clam shells?

cdyblu · 04-21-2005, 04:23 PM

The flat clamshell mounts for a big block are very hard to find and very pricy when you do find them. GM no longer has them, I've seen them on ebay a few times. I'll send you a pic of mine.

LUV2XCLR8 · 04-21-2005, 04:29 PM

CDYBLU

2 THE BOARD FROM WEST 10-UH-C

HuggerCST · 04-21-2005, 04:30 PM

I'd like to see that pic also, or at least know the difference. I have a set, and would like to know that they are correct. Thanks

**ScottH** · 04-21-2005, 10:46 PM

Pics would be very much appreciated.

Thanks!

**ScottH** · 04-26-2005, 02:32 PM

ttt

cdyblu · 04-27-2005, 09:15 PM

sorry, I've been real busy. I will get pics Thursday

Johns70 · 04-27-2005, 10:05 PM

chevyduty has the big block clam shell motor mounts for 14.95 each part number 79-024. checker shucks kragen and auto zone has them to.

cdyblu · 05-01-2005, 12:46 AM

the 67 t0 71 bb mounts are differant than 72 mounts, here are pics of the 67 to 72 bb mounts and brackets. these mounts are the ones that cost $159 each

**DaHos** · 01-16-2015, 07:39 PM

Bump, Back to the original question.....

Any have pics and part numbers for the 72 Only Clam shells?

bluek5 · 01-16-2015, 08:28 PM

Here is a picture of some motor mounts from a 72 GMC big block. I would need to clean them up to try and locate any part numbers. I would bet that the 73 clam shell portion would be very close. Maybe some one else will chime in. I don't know if you can wait another ten years though.
Paul

**DaHos** · 01-16-2015, 08:46 PM

Been doing some mock up w my BB and the original 72 clams should be marked #3993722. I have 2 pr and neither of them will allow the motor to "sit" over the 72 stands/mounts. I have a pr of #334971 and research says they were a SB mount for 73+ These mounts are shallower which allowed the motor to set down and align the bolt hole perfect.......just stumped ??????.........

04-20-2005, 11:34 AM	#1
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,192	Question on mm clam shells I have a set of 72 BB motor mounts that I plan on installing in a 68. However the mm did not come with the clam shells. I've picked up a couple of sets but have noticed some differences. Can anyone tell me if the BB clam shells were unique, different, whatever than other clam shells? If so what are the differences or what should I be looking for? Many thanks to all the helpful folks on this outstanding site. Scott

04-20-2005, 03:51 PM	#2
meathead95 computer illiterate Join Date: Jan 2001 Location: Des Moines, IA Posts: 6,440	i have a set of 1968-1971 nos bbc frame mounts ill trade yah for your 72's __________________ 72 2wd blazer 72 swb 4x4

04-21-2005, 04:23 PM	#4
cdyblu Registered User Join Date: Dec 2004 Location: Green Bay, WI Posts: 44	clamshells The flat clamshell mounts for a big block are very hard to find and very pricy when you do find them. GM no longer has them, I've seen them on ebay a few times. I'll send you a pic of mine.

04-21-2005, 04:29 PM	#5
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,468	CDYBLU 2 THE BOARD FROM WEST 10-UH-C __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T

04-21-2005, 04:30 PM	#6
HuggerCST Registered User Join Date: Jul 2001 Location: North Louisiana Posts: 4,501	I'd like to see that pic also, or at least know the difference. I have a set, and would like to know that they are correct. Thanks __________________ Wynne 70 CST short fleet Hugger orange & white, 350/350, ps, pb, air, tilt, tach/vac/speedwarning, original buckets, AM/FM, oak bed floor, shoulder belts, 3.5"/5.5" drop, 20" American Racing VN425s. Build thread 53 Chevy shortbed 69 Camaro Click here to subscribe Chevy GMC International Truck Club Louisiana Charter Member http://www.louisianaclassictruckclub.com

04-21-2005, 03:35 PM	#3
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,192	MH95, thanks for the offer but gonna go with the 72 mounts. Anyone have any info regarding the clam shells?

04-21-2005, 10:46 PM	#7
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,192	Pics would be very much appreciated. Thanks!

04-26-2005, 02:32 PM	#8
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,192	ttt

04-27-2005, 09:15 PM	#9
cdyblu Registered User Join Date: Dec 2004 Location: Green Bay, WI Posts: 44	sorry, I've been real busy. I will get pics Thursday

04-27-2005, 10:05 PM	#10
Johns70 Registered User Join Date: Dec 2001 Location: Spring Creek, nevada. U.S.A. Posts: 456	chevyduty has the big block clam shell motor mounts for 14.95 each part number 79-024. checker shucks kragen and auto zone has them to. __________________ 69 chevy short wide box project 70 GMC jimmy project

05-01-2005, 12:46 AM	#11
cdyblu Registered User Join Date: Dec 2004 Location: Green Bay, WI Posts: 44	the 67 t0 71 bb mounts are differant than 72 mounts, here are pics of the 67 to 72 bb mounts and brackets. these mounts are the ones that cost $159 each Attached Images

01-16-2015, 07:39 PM	#12
DaHos Senior Member Join Date: Sep 2011 Location: Owosso, Michigan Posts: 2,860	Re: Question on mm clam shells Bump, Back to the original question..... Any have pics and part numbers for the 72 Only Clam shells? __________________ 1967 C10 SWB Owner - Rustbelt Restorations

01-16-2015, 08:28 PM	#13
bluek5 Registered User Join Date: Apr 2012 Location: Lehi,Utah Posts: 1,330	Re: Question on mm clam shells Here is a picture of some motor mounts from a 72 GMC big block. I would need to clean them up to try and locate any part numbers. I would bet that the 73 clam shell portion would be very close. Maybe some one else will chime in. I don't know if you can wait another ten years though. Paul Attached Images

01-16-2015, 08:46 PM	#14
DaHos Senior Member Join Date: Sep 2011 Location: Owosso, Michigan Posts: 2,860	Re: Question on mm clam shells Been doing some mock up w my BB and the original 72 clams should be marked #3993722. I have 2 pr and neither of them will allow the motor to "sit" over the 72 stands/mounts. I have a pr of #334971 and research says they were a SB mount for 73+ These mounts are shallower which allowed the motor to set down and align the bolt hole perfect.......just stumped ??????......... __________________ 1967 C10 SWB Owner - Rustbelt Restorations



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