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Posted By: pan3lman motor mounts: need some help :( - Sun Mar 15 2020 04:40 PM
The engine in my '57 Panel was a 350 that was added later in its life. The engine was shot, so I pulled it, with the plan of swapping it out with a fresh 350. Stupid me gave away the original core without pulling the motor mounts off of the block :|

I have pics of how they looked, and can email them for identification, but can anyone help me identify the new ones that I need to buy? I have the matching part that they are to mate to on the body/frame, I just need to know what to order.

The casting # of the original block was 3970010, which was a 1969-80 Chevy 350.

Thanks in advance,

Jim
Posted By: pan3lman Re: motor mounts: need some help :( - Sun Mar 15 2020 04:42 PM
Pics added:

Attached picture 350_motor_mounts_origd.jpg
Posted By: pan3lman Re: motor mounts: need some help :( - Sun Mar 15 2020 04:42 PM
More pics:

Attached picture 350_motor_mounts_origc.jpg
Posted By: pan3lman Re: motor mounts: need some help :( - Sun Mar 15 2020 04:44 PM
More pics:

Attached picture 350_motor_mounts_orig.jpg
Attached picture 350_motor_mounts_origb.jpg
Attached picture 20200315_121232.jpg
Posted By: pan3lman Re: motor mounts: need some help :( - Sun Mar 15 2020 05:19 PM
These look like they might be the ones! They sure look correct. Can anyone help to confirm? Also, what size bolt holds them on?

https://www.ebay.com/itm/CHEVY-RUBB...4?hash=item41b7baf80c:g:zPEAAOSwal5YKU06
Posted By: bartamos Re: motor mounts: need some help :( - Sun Mar 15 2020 07:55 PM
Looks like that is the one. Not sure. The bolts will be 3/8-16 X 3/4". Measure depth of hole and thickness of motor mount and washer to confirm.
The long bolt should be 7/16 X about 5"...... I see you have that.

Looks like that may have used Camaro mounts?

Anytime you need bolt sizes, just try bolts from your stash or steal one from the motor and try till you find one that threads in by hand. Then measure depth of threaded hole, measure parts stack. Add. Take the test bolt to store to get the correct threads and buy length a tad less than the stack+depth. After a while you will know thread size by looking. Grade 5 is suffice x 10.
Posted By: pan3lman Re: motor mounts: need some help :( - Fri Mar 20 2020 06:16 PM
I found this diagram on a Chevelle site, and Type A sure looks like the ones:

https://www.chevellestuff.net/tech/images/engine_mount_types.jpg
Posted By: bartamos Re: motor mounts: need some help :( - Fri Mar 20 2020 11:51 PM
Try to buy them at a friendly local auto parts store. Known as FLAPS. O'Reilly's has never denied a return by me. Till you find the one that works.
Posted By: pan3lman Re: motor mounts: need some help :( - Sat Mar 21 2020 12:59 AM
Thanks! I have ordered a set from eBay that can be returned if needed. Now let's just hope they don't get hung up in coronavirus customs.. :|
Posted By: miraclepieco Re: motor mounts: need some help :( - Tue Mar 24 2020 02:34 AM
GM part number 92614630
Posted By: pan3lman Re: motor mounts: need some help :( - Mon May 04 2020 05:49 PM
So I got my bolts for the motor mounts. I now have some other questions:

1. I now need a water pump. I considered getting an aluminum one, but the Jegs and Summit ones apparently leak or are poorly cast. Anyone using one of those or recommend another? I'm trying to stay around $100 for the part.

2. I love the old quiet Pete Jackson gear drives, and thought about throwing one in my 350. I keep reading though that they have issues after a while. anyone have thoughts on them?

Thanks!
pan3lman
Posted By: Dusty Re: motor mounts: need some help :( - Fri May 08 2020 05:59 AM
You don't say what engine you are working on .

Have you tried Rock Auto ?
Posted By: Tommy Re: motor mounts: need some help :( - Fri May 08 2020 02:00 PM
Do you have the pulleys and mounting brackets for the accessories?
The reason I ask is there are two different water pumps, a long and a short.The brackets and pulleys may differ for each one. Makes it hard to get belts lined up. I'm not a big fan but, You may want to think about the serpentine set up from a later model motor, everything lines up, and only one belt.
Posted By: 3B Re: motor mounts: need some help :( - Sat May 09 2020 02:36 PM
Hy pan31man, I am a bit late to make my comments, but I feel they are important to make. Back in the mid to late sixties there were incidents of throttle locking in either forward or reverse from a stop, these incidents caused a lot of accidents, It turns out that these incidents were caused by engine mounts that had failed, the steel plates separated from the rubber element, this allowed the engine to lift up when torque developed, this pulled on the throttle and sometimes the engine did not fall back down where it belonged leaving the engine revving. The factory fix was a kit with a bracket that bolted to the two forward exhaust manifold bolts there was also a cable which was wrapped around the upper control arm crosshaft and back to the bracket, this limited the upward movement of the engine if the mount failed. The factory discontinued the original mount, the new mount was designed with interlocking metal pieces so that if the rubber element failed in any way the engines movement would be extremely limited. A few months ago I went into my FLAPS to buy a mount kit and I was flabbergasted to find the original mount design in the box, I told the countermen these mounts were discontinued because they caused accidents when they failed, of coarse they were too young to remember. I am sorry that I do not have the part number of the interlocking mount to give you, but I strongly advise you not to use the non interlocking design mount which I have seen in your posted pictures
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