1969 Z/28 motor mounts

[firstgenaddict]

Shaugs my left side mount was the same as yours the interlocking model.

[z28z11]

PS.  Are you in Murfreesboro?  I'm just north of Huntsville;  we should try to get together sometime... compare notes!

Gary,

North and east of Murfboro about 30 miles - shame our local Camaro club went away; we used to have some great outings and meetings, local drive-ins and events. Maybe we'll get the chance to meet at one of the local shows -

Keep the posts coming - it really is goading me into working on the projects.

Regards,
Steve

[69Z28-RS]

The Anchor PN (2283) listed for the '69 big block 396 was ordered last week on the suggestion of Tmodel66, and received today.   
This part seems to be a great 'duplicate' of the GM 3962740/2748 PN, an interlocking design, minus the GM pn's on the side.   Which is what was on my car originally, and which I believed were too tall, causing my new headers to come too close to the floor underneath. 
Now I've got  3 possible pairs of mounts, and unsure of which ones to use...   The Anchor 2283, which *match* the GM 3962740/2748 mounts, both of which are interlocking, and the GM 3886466 mounts (non interlocking).   Any suggestions?

[1968 Z28]

Don't know if this helps but.....just happened to look at Lucas Restorations gallery of restorations last night and ran across these photos of  a 1969 Z28.  These photos included are of the motor mounts and stands that were removed.

 

 

 

 

 

 

[tmodel66]

The Anchor PN (2283) listed for the '69 big block 396 was ordered last week on the suggestion of Tmodel66, and received today.   
This part seems to be a great 'duplicate' of the GM 3962740/2748 PN, an interlocking design, minus the GM pn's on the side.   Which is what was on my car originally, and which I believed were too tall, causing my new headers to come too close to the floor underneath. 
Now I've got  3 possible pairs of mounts, and unsure of which ones to use...   The Anchor 2283, which *match* the GM 3962740/2748 mounts, both of which are interlocking, and the GM 3886466 mounts (non interlocking).   Any suggestions?

Dang Gary I hate that. They worked for me and I might add it was after I searched and bought from just about every vendor in town. I don't know !!

[69Z28-RS]

The Anchor PN (2283) listed for the '69 big block 396 was ordered last week on the suggestion of Tmodel66, and received today.   
This part seems to be a great 'duplicate' of the GM 3962740/2748 PN, an interlocking design, minus the GM pn's on the side.   Which is what was on my car originally, and which I believed were too tall, causing my new headers to come too close to the floor underneath. 
Now I've got  3 possible pairs of mounts, and unsure of which ones to use...   The Anchor 2283, which *match* the GM 3962740/2748 mounts, both of which are interlocking, and the GM 3886466 mounts (non interlocking).   Any suggestions?

Dang Gary I hate that. They worked for me and I might add it was after I searched and bought from just about every vendor in town. I don't know !!

Well.. maybe that height is correct, and something else is not quite right on my car making the headers hit.  The headers are 'new' so they may not be *right*, or perhaps the rear trans mount is too tall?  Does anyone have a measure for that? 

[69Z28-RS]

the mount photos posted by 1968 Z28 (from Lucas Restorations) seem to match at least some of the ones that were said to be original, with one interlocking mount (2748?), and one non-interlocking (GM 3939728?).   Paceme and first gen addict both said their cars had the interlocking mount on the LHS, and the non-interlocking one on the right...  that seems to be what is pictured in the Lucas Restoration photos.

[tmodel66]

Gary after re-reading your post I believe your problem is the header. You have changed nothing except the header so it has to be. My reasoning is you said the Anchor are like your originals so your originals were working before the headers.  Correct? 

[rszmjt]

The Lucas restoration photos and others have had the drivers side mount changed sometime in the cars history, probably the engine mount recall program GM had back in 69 by GM dealers . Very common to see that type mount, the original type mounts I posted are very rare to see, especially the drivers side as it allways broke due to Engine Torque.
 When I ran the Corvette/Camaro shop we put lots of headers on and had to manipulate ( Bend) headers into proper postion lots of time. Put the car on a hoist and insert  long 2x4 trimed to fit into the collector and get someone to help you carefully pull down on the 2x4 gradually until you have the clearnce needed. You would be surprised how easily they will move. The trick is to gradually pull so as not to kink tubes or break welds. Done it lots, it works.

[69Z28-RS]

Tmodel66 posted: 
"Gary after re-reading your post I believe your problem is the header. You have changed nothing except the header so it has to be. My reasoning is you said the Anchor are like your originals so your originals were working before the headers.  Correct?"
....

Well.  the GM 3962748 mounts may have come from a '70 LT1 I had, rather than the '69 Z28.    those mounts are shown as 'original' for the '70 350 engines in the '70 P&A catalog.   I now suspect the problem is the headers, although I'm not perfectly confident about the mounts, since I don't have the original 302 mounts.  As many have said, Chevy used non-interlocking mounts from '55 thru '69? and they often broke apart due to engine torque.  I've changed out many over the years on various small block chevys I've owned when the mounts were in 'two parts' when removed.    Seems chevy tried many solutions to the 'engine torque' issue before they finally addressed it..  ie. the 'tie down' mod/recall, and I suppose finally the interlocking mount.  I still need to decide which of the mounts I have is 'closest' or 'most acceptable in original unrestored judging' or survivor classes before I put my engine back in.

[69Z28-RS]

The Lucas restoration photos and others have had the drivers side mount changed sometime in the cars history, probably the engine mount recall program GM had back in 69 by GM dealers . Very common to see that type mount, the original type mounts I posted are very rare to see, especially the drivers side as it allways broke due to Engine Torque.
 When I ran the Corvette/Camaro shop we put lots of headers on and had to manipulate ( Bend) headers into proper postion lots of time. Put the car on a hoist and insert  long 2x4 trimed to fit into the collector and get someone to help you carefully pull down on the 2x4 gradually until you have the clearnce needed. You would be surprised how easily they will move. The trick is to gradually pull so as not to kink tubes or break welds. Done it lots, it works.

I appreciate your comment;  I've leaned on the header a bit when I installed them the first time, but was afraid of breaking apart welds with too much effort?   GIven your suggestion, I suppose I'll just use your 2x4 suggestion and 'lean harder' and see what happens.. 

[lynnbilodeau]

So... at some point in the model year, did the 3962748 (green stripe) make it to the assymbly line?

Guys with late cars, anyone have original mounts?

I have an old 3962748 and comparing it to the Anchor 2283, looks like Anchor may have been the supplier.  They are pretty darn close.

[iceman]

   

   guys 
           i am confused now my left mount #3963700blk/3962748green/3972740gold  3974735gold nut and3980701
  i thought this was orig. but it looks like a spacer is needed.   help.
                                                                                                   tks iceman

[lynnbilodeau]

I don't believe any spacer is needed.   It has all those numbers because the rubber mold was the same for each number, but the metal parts differed.  After assembled, they put a green stripe on the 748 mounts, etc. different color code for each mount.

If you have green paint, you don't need a spacer.

[KurtS]

Can someone post the dimensions of some of these parts for reference?

Thanks!