1972 big block mounts question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**General23cmp** · 04-29-2016, 10:58 AM

If I have the correct 1972 big block towers on the frame and the correct brackets for the engine, will 1973+ clamshell mounts work? They look almost identical from photos, especially their bolt pattern, but their two raised bumps on the engine side look a little different.

Are 1972 BB clamshells available from auto stores? I imagine the brackets are the difficult part, as the rubber mount is typically considered replaceable.

SS Tim · 04-29-2016, 08:08 PM

Might be a good place to start.
http://67-72chevytrucks.com/vboard/s...d.php?t=442919

**General23cmp** · 04-29-2016, 08:21 PM

Thanks, but no. Been there, no answer.

Did research elsewhere and I believe if you want replacement clamshells for a 1972, the 1973 and up big block/diesel clam shells are the right ones. Pn 2395. If you try to use the national chain auto part websites, you won't get this one.

**General23cmp** · 04-29-2016, 08:43 PM

For example, Autozone wants you to get this...which I believe is a car big block mount.

**General23cmp** · 04-29-2016, 09:51 PM

Another interesting note, check out pn 34-0330 on the LMC truck site for a 72 402 engine mount. Then check out the 1973-87 truck section and see what the engine mount pn is for a 454. Same. Good thing to know for those with 72 big blocks needing clamshell mounts.

04-29-2016, 10:58 AM	#1
General23cmp Senior Member Join Date: Mar 2016 Location: Athens, AL Posts: 360	1972 big block mounts question If I have the correct 1972 big block towers on the frame and the correct brackets for the engine, will 1973+ clamshell mounts work? They look almost identical from photos, especially their bolt pattern, but their two raised bumps on the engine side look a little different. Are 1972 BB clamshells available from auto stores? I imagine the brackets are the difficult part, as the rubber mount is typically considered replaceable. Last edited by General23cmp; 04-29-2016 at 11:12 AM.

04-29-2016, 08:08 PM	#2
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,507	Re: 1972 big block mounts question Might be a good place to start. http://67-72chevytrucks.com/vboard/s...d.php?t=442919 __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban

04-29-2016, 08:21 PM	#3
General23cmp Senior Member Join Date: Mar 2016 Location: Athens, AL Posts: 360	Re: 1972 big block mounts question Thanks, but no. Been there, no answer. Did research elsewhere and I believe if you want replacement clamshells for a 1972, the 1973 and up big block/diesel clam shells are the right ones. Pn 2395. If you try to use the national chain auto part websites, you won't get this one.

04-29-2016, 08:43 PM	#4
General23cmp Senior Member Join Date: Mar 2016 Location: Athens, AL Posts: 360	Re: 1972 big block mounts question For example, Autozone wants you to get this...which I believe is a car big block mount. Attached Images

04-29-2016, 09:51 PM	#5
General23cmp Senior Member Join Date: Mar 2016 Location: Athens, AL Posts: 360	Re: 1972 big block mounts question Another interesting note, check out pn 34-0330 on the LMC truck site for a 72 402 engine mount. Then check out the 1973-87 truck section and see what the engine mount pn is for a 454. Same. Good thing to know for those with 72 big blocks needing clamshell mounts.



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