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1970 Torino big block motor mounts
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545CJ View Drop Down
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    Posted: 06-January-2025 at 6:48AM
For you big block (385 series) guys making big power, what engine mounts are you using? I’m sure these stock rubber ones will not hold up to real power. I have searched and searched endlessly for any company that makes a serious aftermarket mount and it appears that nobody does. It’s the same rubber mount as as ‘67-68 big block Mustang/Shelby, so I’m really surprised nobody makes a serious mount. Any ideas? I’ve seen some mentions of Crites mounts, but they appear to raise the engine up for some reason, which is NOT an option here. I need something that will keep the engine in the stock location. 

Any suggestions within that criteria are appreciated. 
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Points: 6780 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 72FordGTS Quote  Post ReplyReply Direct Link To This Post Posted: 06-January-2025 at 7:21AM
Crites is out of business (he passed away), so they are not an option even if you were ok with them.  Are their not a few places that specialize in rebuilding engine mounts?  Maybe of on them can reinforce the factor units.
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Originally posted by 72FordGTS 72FordGTS wrote:

Crites is out of business (he passed away), so they are not an option even if you were ok with them.  Are their not a few places that specialize in rebuilding engine mounts?  Maybe of on them can reinforce the factor units.

I can’t say I know of any, though I’m sure they exist. The problem I think would be how to reinforce it meaningfully without A) effectively making it a solid mount, and B) changing the dimensions. I could drill a couple of holes through the mounts and install a couple large bolts with washers through each.. but then you’re also getting into effectively a solid mount. And there isn’t a lot of room to play with in there. 

I’d done things like that in the past, with moderate success. I’d rather buy something that someone else has already put the R&D time into, I’m just surprised nobody has taken on that task considering the popularity and value of those Mustangs and Shelbys that used the same mounts. 
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Agreed, someone should have already built an aftermarket mount that continued to be available. Was there ever one made such as a urethane engine mount? I recall 10-15 years ago seeing a video of how a person poured a urethane material(it was red) into an old mount. They built a form around the old mount after they removed most of the original rubber, and filled it, let it cure, and then cleaned up the excess outside of it. That looked like a good potential upgrade for an existing old mount. I thought that would become a common thing in the future, I never bookmarked the page or site. It wasn't youtube I saw that on.
Don
73 Ranchero "Sport 72 front end", floor shift/console, planning EFI 7000 rpm 351 stroker
73 Ranchero GT 351C-4V &4R70W for sale later.
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Originally posted by 72 RS 351 72 RS 351 wrote:

Agreed, someone should have already built an aftermarket mount that continued to be available. Was there ever one made such as a urethane engine mount? I recall 10-15 years ago seeing a video of how a person poured a urethane material(it was red) into an old mount. They built a form around the old mount after they removed most of the original rubber, and filled it, let it cure, and then cleaned up the excess outside of it. That looked like a good potential upgrade for an existing old mount. I thought that would become a common thing in the future, I never bookmarked the page or site. It wasn't youtube I saw that on.

That would be interesting, but what I want to see is a captured mount where the mount cannot separate apart even if the rubber/urethane disintegrated. Many aftermarket small block Ford mounts come to mind, as well as factory GM clamshell mounts, among others. I would think there would be at least some market to sell such a mount. 

It would not be at all difficult. There is plenty of room to create such a design. Simply eliminate the bracket that bolts to the block and design the mount to bolt directly to the block. It could be double the thickness that way, giving plenty of room to design something like a GM clamshell mount that would be incredibly strong and durable. 
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Realistically, you only need one mount to handle the power. The other is more of a cushion.
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Originally posted by handsofstone handsofstone wrote:

Realistically, you only need one mount to handle the power. The other is more of a cushion.

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Prove me wrong. Obviously you need two but the one taking the power is the one I would upgrade if given the choice of only replacing one side and keeping a stock second.
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Originally posted by handsofstone handsofstone wrote:

Prove me wrong. Obviously you need two but the one taking the power is the one I would upgrade if given the choice of only replacing one side and keeping a stock second.

Kinda hard to believe people actually think this way. Nevermind the fact that this is completely false, it still doesn’t address the issue of availability, which was my question. Whether I need one or 100, there aren’t any available to choose from. 

I’d love to hear you try to explain the physics behind your claim. You made the claim.. defend it. Isaac Newton and I can’t wait to hear this. 
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The passenger side supports half of the normal weight of an engine, the left one has to resist the lifting forces. I doubt either mount is minor in importance, but the left one is the one I'd expect to rip apart with high power.


I added a chain to my first 72 GT when I was in high school, my one car mentor told me stories of drag racing, and it seemed cool at the time. The length of 8-10" was no big deal to attach, but it wasn't needed(the 4V was mild and the trans was a C4).
Don
73 Ranchero "Sport 72 front end", floor shift/console, planning EFI 7000 rpm 351 stroker
73 Ranchero GT 351C-4V &4R70W for sale later.
92 Lincoln Mark VII SE GTC, OBDII 347/4R70W
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Originally posted by 72 RS 351 72 RS 351 wrote:

The passenger side supports half of the normal weight of an engine, the left one has to resist the lifting forces. I doubt either mount is minor in importance, but the left one is the one I'd expect to rip apart with high power.


I added a chain to my first 72 GT when I was in high school, my one car mentor told me stories of drag racing, and it seemed cool at the time. The length of 8-10" was no big deal to attach, but it wasn't needed(the 4V was mild and the trans was a C4).

There’s no question that the forces imparted to the mounts are different side to side, and I’d agree that the driver’s side mount is more likely to separate because of the direction the force is applied.. but his claim that the opposite mount is essentially just a cushion and doesn’t matter is completely absurd. The force being applied is a rotational twisting force wanting to twist the engine around the crankshaft centerline, not pushing straight outwards toward the mount. It’s not like the upper dogbone mounts that a lot of transverse mounted engines have, to specifically resist that rotational force. 

His nonsense still misses the point as well, because if I can find one, I can find two, thus making his erroneous point moot anyway. 
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My intention was not to get you upset. Merely suggesting what I did was a bit of humor but your point is taken. The mounts are hens teeth if you can even find a set but the fact remains that the passenger side mount has little bearing on rotational forces unless reverse racing.
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Points: 3445 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 72 RS 351 Quote  Post ReplyReply Direct Link To This Post Posted: 27-January-2025 at 8:33AM
My apologies for a dumb question; what are the 400 engine mounts, how do those compare to big block mounts? I have a pair used someplace that came with my 400 in the mid 80's. are those useful for anything?
Don
73 Ranchero "Sport 72 front end", floor shift/console, planning EFI 7000 rpm 351 stroker
73 Ranchero GT 351C-4V &4R70W for sale later.
92 Lincoln Mark VII SE GTC, OBDII 347/4R70W
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