Need help to verify I have a Vert Motor mount

[Steve McMahan]

Since my 73 was/is a mostly basket case, I only received one motor mount. Now, until today, I just assumed it was just It was one of vert motor mounts I needed. Then I realized, I have no idea if this truly a vert mount. The reason I’m now questioning my earlier belief is that, I got more than just 73 vert parts in those baskets, some of which I’ve put on this site for ID. None of those were for a 73 Mustang.

So, here is a side pic of the two types I have, with the one on the left from my Coupe, and the one on the right from my vert parts box. Is that a vert mount? I know you cannot be 100% sure, but it is quite different on the engine attaching metal flange part. When you clamp them down on the engine attaching segment of the flange, you can tell the coupe one from the vert one in that the edge of the clamshell actually almost touches that same surface. Thank you for taking a look at this.

 

[judge]

Two things, the first I recommend that you buy the concourse bolt kit. Using hardware store fasteners don't have the gripping surfaces that Ford designed for. The build/assembly manual has notes in many places that specify no substitutes on certain fasteners, these were likely dot/crash tested or something. But the notes are there, I've built three cars from boxes. And it's worth the expense of having the fasteners ready at each phase. Ok, said and enough.
The next, the convertible motor mount issue has been researched and they are different. Look again for articles on this. I don't remember all the details, but you have touched on some with your questions.

 

[Steve McMahan]

Thanks for the insights. I bought grade 8 bolts, thinking that would hold back all 150 HP of this monster lol.

I’m still hoping to get a vert owner, who has his engine out, to setup one of his motor mounts to see if it matches the one I have. With no markings on these things, it’s a complete crap-shoot to know what I have.

 

[lectricegg]

I had a classic car shop do a lot of work on my 73 vert and they found bad motor mounts. They ended up with 72 motor mounts, engine side and frame side.

 

[will e]

A while ago I picked up an original pair of 73 convertible motor mounts from a board member. You can see in the picture he posted the part number 665 on the convertible mounts. The convertible mounts will be 'shorter' than hardtop. The engine sits slightly lower.

https://7173mustangs.com/threads/1973-mustang-oem-motor-mounts-sold.24370/

You might also try reposting with a more descriptive title. Specifically mention motor mounts and some of the guys who know a lot about this subject might spot it a bit easier.

 

[Steve McMahan]

Unfortunately, both of the mounts, coupe and vert, have 665 stamped on the clamshell metal segment. I’ll update the thread title.

But wait, you say the Vert mounts allow the engine to sit lower? As you can see by the pics I posted in the original discussion of my MM issue, the ones I removed from my coupe are 2.8” from the engine mounting surface to the centerline of the pedestal mount, and the one I thought was a Vert mount is 3.5”. So is it possible, that my couple, all along, had the wrong MM’s on them, the Vert ones? I don’t know to mid-edit, add the link to my build page where the pics are. But it’s not hard to find.

Thanks @will e for the insights.

 

[Steve McMahan]

Here is my full story:

Post in thread '1973 Convertible Project: Coupe Parts Swap Begins'
https://7173mustangs.com/threads/1973-convertible-project-coupe-parts-swap-begins.45402/post-466729

 

[will e]

That's interesting that they have the same 665 stamp. This add has pictures of their used 73 coupe only and you can see the 665 stamp in their picture as well.

https://secure.cougarpartscatalog.c...-1973-Mercury-Cougar-/-1973-Ford-Mustang.html

When I put the ones I bought into my convertible it did lower the engine a bit but I had the wrong 71/72 mounts, modified, in before so I don't have a good comparison.

 

[will e]

According to that website (cougarpartscatalog) the part numbers:

D3ZZ-6038-A Coupe
D3ZZ-6038-B convertible

Their picture of the convertible one also shows 665

 

[edselwagon]

First time posting here, but i'll share what little i know.

Yes, it appears the mount on the right is for a convertible. I don't see it mentioned here, but the 1973 frame brackets are different between coupe/fastback and convertible, and when you place a coupe mount and bracket next to a convertible mount and bracket they end up being the same height and angle. My best guess for Ford having different convertible mounts is something to do with harmonics or vibrations, but i haven't been able to confirm that.

Also i've seen two different versions of each style of the 1973 mount; one with the "665", the other without, but with slight differences in the forming of the stamped metal. I'm not sure if they had two different manufacturers making them at the time or if one version is assembly line and the other is later service part. The "665" has one round hole and one oval hole between each pair of rivets. The other style has "62190" on the underside of the flange and has oval holes between each pair of rivets.

For what it's worth.

Garrett
Mustangs, Etc.

 

[Steve McMahan]

It’s weird that the member @AlexM cited that the convertible mounts were “shorter” than the coupe mounts. It’s too bad a 73 Vert member can’t post a pic of their mounts, clamped to a table top with measurements from that plane, to see the measurable differences between the two.

 

[AlexM]

Hi All, I'm far from the 71-73 expert but I’ll add what I can.

When I researched those motor mounts I sold I was trying to figure out why they looked so different from other types. And why one pair was shorter than the others. Being a ’69-’70 guy this was all new to me.

https://7173mustangs.com/threads/1973-mustang-oem-motor-mounts-sold.24370/

Learning mostly from this site, I first figured out that 73’s used the captive style motor mounts and ’73 convertibles used the shorter version. I didn’t understand why, thinking that the motor just needed to sit lower for some reason. I later found out that the convertible frame mounts were taller than hardtop models. Something to do with reducing vibration. But overall it made the engine sit the same height.

I also noticed that Ford didn’t service the shorter (76) motor mounts or taller frame mounts? So I guess it’s possible that some owners might have swapped out frame mounts and motor mounts to make it fit. Using the more common (serviced) taller motor mounts with shorter frame mounts. I could see ’73 convertibles showing up that way over the years given the limited availability of the original setup. Just speculating here… Or even just using the incorrect motor mounts all together tall or short in any setup not realizing there’s a difference.

From what I recall the motor mount on the left in Steve’s picture is for the Convertible (shorter) and the one on the right (taller) is for everything else. I don’t have a side by side picture of the ones I had but what’s in that picture is pretty much how I remember the size difference. My shorter ones were stamped 665 and I thought that was unique to the shorter versions as the taller ones didn’t have a stamping. But I didn’t have any others to compare to.