Well, I'm preparing to put a 489 in my 'velle pretty soon, and I'm going to put in new motor and tranny mounts at the same time.

The question is, what kind to get - does it matter?
Stock Rubber?
Poly or Polygraphite?

What about heights? Are there any that would alter the height of the engine in the engine bay? A tad lower would be beneficial for me - I know using a taller tranny mount would help in that regard, and I do think there are 2 height tranny mounts, just not 100% on it.

Any input/thoughts/comments would be greatly appreciated, as always.

Mark,

I have had pretty good luck running urethane Energy Suspenssion engine and transmission mounts. They are pretty strong and fit nicely. :D

As far as I know I have a stock 454 in my Chevelle and have broken the stock rubber motor mounts twice. This last time I used the Energy Suspension urethane mounts with the built in safety and have had no problems.

I run solid steel on both, I dont tell any difference over rubber.

Mark,IMHO and experience a solid, steel mount on drivers side in conjunction with a stock mount on the passenger and a stock tranny mount work the best.

I run solid steel on both, I dont tell any difference over rubber.

Mark,IMHO and experience a solid, steel mount on drivers side in conjunction with a stock mount on the passenger and a stock tranny mount work the best.

Now, I wouldn't have thought that using a solid steel mount would be a good thing for vibration & noise. Even more interesting idea to mix them, solid on driver's side for the torque and stock elsewhere...

If I were to do this without asking, I would have picked up a set of Poly with the safety lock tab....

Any more input? What about the 2 heights of tranny mounts I've heard about?

What ever you decide on go and check them for fit before assuming they will fit. I can't seem to find a motor mount that fits the first time out. Either the spread is to wide or to short for the frame stands.

as far as mount height goes, for 68-72 the 307 frame stand is taller and wider than the 350/BB stand and uses its own mount. The engines sit in the same position regardless of the mount pair used, but 307 frame stands have to be used with 307 engine mounts and 350/BB frame stands have to be used with 350/BB engine mounts. Problems start when you try to pry open a 350 mount to fit over a 307 frame stand and the engine sits too high. Keep them matched and there are no issues.

What about these Lakewood Muscle Mounts? Seem like the best of both worlds, assuming it's not just a sales pitch. Anyone try them?

Oh for crying out loud!!! YOU DRIVE LIKE A GRANDMA ANYWAYS, this shouldn't even be an issue. :D:D

What about these Lakewood Muscle Mounts? Seem like the best of both worlds, assuming it's not just a sales pitch. Anyone try them?

waste of cash.I don't have personal experience with them in Chevy but I do in 72 Mustang I worked on..
Not to sound like a broken record but the solid drivers side mount and everything else stock will work very well for you and there will be NO vibration of any kind.

Oh for crying out loud!!! YOU DRIVE LIKE A GRANDMA ANYWAYS, this shouldn't even be an issue. :D:D

Have you SEEN my grandma drive?? :D

waste of cash.I don't have personal experience with them in Chevy but I do in 72 Mustang I worked on..
Not to sound like a broken record but the solid drivers side mount and everything else stock will work very well for you and there will be NO vibration of any kind.

That's what I wanted to hear! I was thinking the Lakewoods might be just stock mounts with thicker metal, wasn't real sure.

Energy was fine for engine mounts ... tranny mounts don't work. Do a search, we've all had problems pushing Muncie 4spd too high into trans tunnel. Went with AutoZone TH400 mount.

Thumbs up to the energy suspension ones here. Little bit shakey, but not bad. There are two heights of the engine mounts, and from what I've seen there seems to be no rhyme or reason to which ones fit your car. I had to use the "talls".

I use poly engine mounts and rubber trans mount... very happy with the results. I've heard several people say they got a lot of driveline vibration and harmonics when using a poly trans mount.

I used the poly engine and trans mounts. No complaints on the engine mounts, but funny you should mention driveline noise/vibration, I do have a little, but attested it to the need for having the driveshaft redone (planned for the winter).

I've got a solid engine mount on drivers side, and stock on passenger side and a stock trans mount. Switched to solid on drivers side since I was tearing stock ones apart, and haven't noticed a huge increase in vibration.

In my '69, I could not get the headers to line up once the motor was in. After much frustration, I ended up putting the taller rubber ones (with the chain link, so they won't break) in there. The primary tubes for the headers are very fat, and wouldn't fit with the shorter ones. The drawback was that my air cleaner is very close to the hood now.