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]> 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 > > 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]" <[EMAIL PROTECTED]> > To: [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 > ------------------------------ > More new features than ever. Check out the new AOL > Mail<http://o.aolcdn.com/cdn.webmail.aol.com/mailtour/aol/en-us/text.htm?ncid=aolcmp00050000000003> > ! > > > ------------------------------ > Never miss a thing. Make Yahoo your > homepage.<http://us.rd.yahoo.com/evt=51438/*http://www.yahoo.com/r/hs> >
