Big Block Motor Mounts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**DREW67** · 11-21-2007, 12:49 PM

I was wonder is there a differents in motor mounts for a big block 67-68 vs 69-72? Any pictures?

Thanks
Drew

**Classic Heartbeat** · 11-21-2007, 12:58 PM

67s didn't have big blocks, 68-71 has one style of mount and 72 has another. Pictures are on my other computer or I would post them. WES

66skylarkpost · 11-21-2007, 01:00 PM

67-71 bb mounts had an upper that attached to the motor with a smaller lower piece ,with a frame towers kinda like the small block but had a bigger hole and different sitting . in 72 the big blocks went to the later clam shell motor mounts ,a completly different flater frame tower .

**john** · 11-21-2007, 02:07 PM

Heres a how to on using 73-87 mounts in a 67-72 truck. These mounts are cheap and plentiful.
http://67-72chevytrucks.com/vboard/s...d.php?t=128765

FRENCHBLUE72 · 11-21-2007, 02:13 PM

I used the early stell frame mounts with 350 rubbers I believe,its been so long since I looked at it. I do know the I got the idea off of herefrom board member tx firefighter I believe..

**Classic Bowties** · 11-21-2007, 07:29 PM

Here are pics of the two types of BBC towers that were used in all 68-72 factory 396/402 2wd trucks, the 68-71 type are in the top pic and the 72's are in the bottom pic. Cb

cruiserman · 11-21-2007, 07:38 PM

CSK shows the same motor mount for SBC and BBC. Imagine my surprise when I attempted to replace my 402 mounts. It grew to a horror show when I priced mounts at the GM dealer.

FRENCHBLUE72 · 11-21-2007, 08:55 PM

i USED THE 68-71 WITH THE 350 CUSHIONS..

69trk · 11-21-2007, 09:08 PM

I bought some motor mounts from performance online and they worked perfect. They had no issues with clearance with headers or anything. Also they looked better than stock, they are tubular in design and the polyurethane motor mounts were also available for an additional $50. I want to say that i paid around 150 for the complete set. Goto performanceonline.com.

qksilver · 11-21-2007, 10:12 PM

They work well, a couple of guys around here have used them.

**DREW67** · 11-21-2007, 11:07 PM

Thanks Guys for all the help. Do you just use 350 motor mounts with the 68-71 mounts? If I was to use the 72 do I have to modify my frame?

**Chevy Fleetside** · 11-27-2007, 04:46 PM

Quote:

Originally Posted by 69trk

I bought some motor mounts from performance online and they worked perfect. They had no issues with clearance with headers or anything. Also they looked better than stock, they are tubular in design and the polyurethane motor mounts were also available for an additional $50. I want to say that i paid around 150 for the complete set. Goto performanceonline.com.

Got any pictures of this. I was thinking about ordering some for my 65 and was wondering how low they sat. thanks..

Richard Dobson · 11-27-2007, 05:52 PM

I have removed a 396 from a 69 GMC which has motor mounts that look like the first picture shown, can I use the motor mounts in my 71 Chevy?

Tx Firefighter · 11-27-2007, 06:30 PM

Quote:

Originally Posted by Richard Dobson

I have removed a 396 from a 69 GMC which has motor mounts that look like the first picture shown, can I use the motor mounts in my 71 Chevy?

Absolutely. They are the correct mounts for a 71 model too and will bolt in without modification.

**DREW67** · 11-27-2007, 07:23 PM

Today I test fitted the 72 on my 67 and they do not line up right with the top frame rails and holes and then there is a 1/4" gap between bracket and frame rail.

Tx Firefighter · 11-27-2007, 08:25 PM

Quote:

Originally Posted by DREW67

Today I test fitted the 72 on my 67 and they do not line up right with the top frame rails and holes and then there is a 1/4" gap between bracket and frame rail.

It sounds like you might have 73-87 mounts rather than 72 big block mounts. They typically need a spacer between them and the frame rail to make up the gap.

They look extremely similar. Easiest way to differentiate between the two types is to count the number of ribs on them. 72 has one rib. 73+ has 2 ribs.

**DREW67** · 11-27-2007, 08:39 PM

Here are a few pictures of what I'm talking about. I mounted one the bolts to the cross memeber it is the only one that lined up. This occurs on both sides.

Tx Firefighter · 11-27-2007, 08:45 PM

They're definitely 72 big block mounts.

It does seem like I read in the past that 67's sometimes needed some slight frame mod to do this since they were never engineered to be factory big blocks. I'm out of my element here though, as I've had 3 big block trucks, a 69, a 70 and now a 72, never a 67 though.

**lolife99** · 11-27-2007, 11:05 PM

Doesn't the top rail need to be trimmed? As in narrowed so the top bolt holes will line up. Also,...if running headers,... you might want to test fit them so you can grind a little frame clearance.

Longhorn Man · 11-27-2007, 11:10 PM

Tx... I'm pretty sure you are right on that.

11-21-2007, 12:49 PM	#1
DREW67 Senior Member Join Date: Aug 2001 Location: Kansas City, Mo Posts: 1,031	Big Block Motor Mounts I was wonder is there a differents in motor mounts for a big block 67-68 vs 69-72? Any pictures? Thanks Drew __________________ DREW67

11-21-2007, 12:58 PM	#2
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,766	Re: Big Block Motor Mounts 67s didn't have big blocks, 68-71 has one style of mount and 72 has another. Pictures are on my other computer or I would post them. WES __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys

11-21-2007, 01:00 PM	#3
66skylarkpost Registered User Join Date: Mar 2006 Location: kearney,nebraska Posts: 443	Re: Big Block Motor Mounts 67-71 bb mounts had an upper that attached to the motor with a smaller lower piece ,with a frame towers kinda like the small block but had a bigger hole and different sitting . in 72 the big blocks went to the later clam shell motor mounts ,a completly different flater frame tower . __________________ '70 k-10 longbox- mid 70's drivetrain 350/350 487x heads 10.1:1 flowmasters ,35's 3.73's auburn posi ,rear shackle flip. '72 short stepside U.S. forestry truck, '73 455 buick,400 turbo,dropped 2"-4 1/4" ,3.07 posi,:'89 silverado 1500 ,OK truck ,5.7 holley tbi ,trick 700r4 3.07 auburn posi ,and my '66 skylark ,'73 centurion and my '84 monte carlo imca stock car

11-21-2007, 02:07 PM	#4
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: Big Block Motor Mounts Heres a how to on using 73-87 mounts in a 67-72 truck. These mounts are cheap and plentiful. http://67-72chevytrucks.com/vboard/s...d.php?t=128765 __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/ Last edited by john; 11-21-2007 at 02:07 PM.

11-21-2007, 02:13 PM	#5
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,606	Re: Big Block Motor Mounts I used the early stell frame mounts with 350 rubbers I believe,its been so long since I looked at it. I do know the I got the idea off of herefrom board member tx firefighter I believe.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

11-21-2007, 07:29 PM	#6
Classic Bowties Always on the hunt... Join Date: Sep 2006 Location: Portland, OR. Posts: 5,747	Re: Big Block Motor Mounts Here are pics of the two types of BBC towers that were used in all 68-72 factory 396/402 2wd trucks, the 68-71 type are in the top pic and the 72's are in the bottom pic. Cb Attached Images Last edited by Classic Bowties; 11-25-2007 at 04:09 PM. Reason: info

11-21-2007, 07:38 PM	#7
cruiserman Registered User Join Date: Dec 2006 Location: Idaho Posts: 210	Re: Big Block Motor Mounts CSK shows the same motor mount for SBC and BBC. Imagine my surprise when I attempted to replace my 402 mounts. It grew to a horror show when I priced mounts at the GM dealer. __________________ 72 C2500 LWB 402 Sierra Grande 05 Odyssey 08 Tundra

11-21-2007, 08:55 PM	#8
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,606	Re: Big Block Motor Mounts i USED THE 68-71 WITH THE 350 CUSHIONS.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

11-21-2007, 09:08 PM	#9
69trk Registered User Join Date: Oct 2006 Location: bridgecreek ok. Posts: 1,214	Re: Big Block Motor Mounts I bought some motor mounts from performance online and they worked perfect. They had no issues with clearance with headers or anything. Also they looked better than stock, they are tubular in design and the polyurethane motor mounts were also available for an additional $50. I want to say that i paid around 150 for the complete set. Goto performanceonline.com.

11-21-2007, 10:12 PM	#10
qksilver Senior Member Join Date: Dec 2004 Location: Southern Pines NC Posts: 3,853	Re: Big Block Motor Mounts They work well, a couple of guys around here have used them.

11-21-2007, 11:07 PM	#11
DREW67 Senior Member Join Date: Aug 2001 Location: Kansas City, Mo Posts: 1,031	Re: Big Block Motor Mounts Thanks Guys for all the help. Do you just use 350 motor mounts with the 68-71 mounts? If I was to use the 72 do I have to modify my frame? __________________ DREW67

11-27-2007, 05:52 PM	#13
Richard Dobson Registered User Join Date: Apr 2003 Location: Easley, South Carolina Posts: 491	Re: Big Block Motor Mounts I have removed a 396 from a 69 GMC which has motor mounts that look like the first picture shown, can I use the motor mounts in my 71 Chevy? __________________ Richard Dobson

11-27-2007, 07:23 PM	#15
DREW67 Senior Member Join Date: Aug 2001 Location: Kansas City, Mo Posts: 1,031	Re: Big Block Motor Mounts Today I test fitted the 72 on my 67 and they do not line up right with the top frame rails and holes and then there is a 1/4" gap between bracket and frame rail. __________________ DREW67

11-27-2007, 08:39 PM	#17
DREW67 Senior Member Join Date: Aug 2001 Location: Kansas City, Mo Posts: 1,031	Re: Big Block Motor Mounts Here are a few pictures of what I'm talking about. I mounted one the bolts to the cross memeber it is the only one that lined up. This occurs on both sides. Attached Images __________________ DREW67

11-27-2007, 08:45 PM	#18
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Big Block Motor Mounts They're definitely 72 big block mounts. It does seem like I read in the past that 67's sometimes needed some slight frame mod to do this since they were never engineered to be factory big blocks. I'm out of my element here though, as I've had 3 big block trucks, a 69, a 70 and now a 72, never a 67 though. __________________ I'm on the Instagram- @Gearhead_Kevin



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11-27-2007, 11:05 PM	#19
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,700	Re: Big Block Motor Mounts Doesn't the top rail need to be trimmed? As in narrowed so the top bolt holes will line up. Also,...if running headers,... you might want to test fit them so you can grind a little frame clearance. __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 Last edited by lolife99; 11-27-2007 at 11:09 PM.

11-27-2007, 11:10 PM	#20
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Big Block Motor Mounts Tx... I'm pretty sure you are right on that.

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