I changed from a 307 to a big block and just used 307 mounts on the
block. I believe theres a difference in how tall they are. I have'nt had
any problems with them. James
Jon Vore wrote:
The 307 mounts are different for some reason. I ran into the same
thing. You can change the pedestals on the fram, but I don't see why
you couldn't just use 307 Motor Mounts on your 454. I believe the
block side is the same between BB/SB. Maybe someone else could answer
that one for sure.
On Dec 5, 2007 1:40 PM, SLWeaver <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Ausleys and others show the engine mount (frame) as the same part
number for 68-72 cars
http://www.chevelle.com/catalog/index.php?cPath=57_125_223
<http://www.chevelle.com/catalog/index.php?cPath=57_125_223>
and energy suspension shows the motor mounts the same for 454,
396, 350, but differnet # for 307...
http://www.energysuspension.com/pages/mt_tr3.html
the truck motor mounts are also differnt form the chevelle motor
mounts... are using chevelle/malibu motor mounts for the 454?
becasue truck motor mounts are different number
I do recall switching out the frame mounts on one car for whatever
reason at one time but do not recall if the mount (it bolts to
crosmemember and the motor mount sits on top) is any shorter/wider
or whatever for big block or 307....you should call one of those
guys above, or even the GM dealer. they are usually pretty helpful
SLWeaver
----- Original Message ----
From: "[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>" <
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
To: [email protected] <mailto:[email protected]>
Sent: Wednesday, December 5, 2007 12:32:17 PM
Subject: [Chevelle-list] Motor Mounts
I've been reading the questions posted for the last couple of
years and have one of my own. I sold my last Chevelle 14 years
ago when my son was born, so it's been a while- it feels good to
be a Chevelle owner again.
I recently purchased another 70 Chevelle to play with. I have a
454 with TH400 from a 73 Chevy C10 that I will be swapping
over but the motor mounts are different. I purchased a set of
mounts from the parts store but they don't fit down over the frame
mount. The frame mount is about 1/4" wider than the opening of
the motor mount.
I looked on-line at different suppliers and parts stores but they
all appear to be the same part number. Do I need different frame
mounts or is there a different motor mount I'm not finding? My
step-father thinks there were two different motor mounts. The
Chevelle I have did not come with an engine so I don't know for
sure what it had originally; it appears to have been a SBC. From
my searches it looks like the frame mount and motor mount for a
350 to 454 are the same and the motor mount for a 307 is a
different style.
Any help is appreciated.
Eric
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