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LS1 motor mount question

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Old Feb 26, 2012 | 01:33 PM
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Default LS1 motor mount question

I'm sure I'm missing something obvious here, but I went to bolt my stock '75 motor mounts to the Dirty Dingo adapter plates I'm using for the LS1 conversion, and they won't mount flush to the plates. There's a small hump on the back of the stock motor mount that hits the adapter plate, and it leaves a small gap between the two. No way it is supposed to be like this...

What am I missing? Did you guys have to shim the stock mount with washers? The bolts provided with the mounts don't seem nearly long enough to do that...
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Old Feb 26, 2012 | 02:16 PM
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Here's a pic...

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Old Feb 26, 2012 | 02:46 PM
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That's pretty common. Most plates will have a cut out for that. If it's just rubber or poly you can just chop that off flush.
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Old Feb 26, 2012 | 02:51 PM
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Yeah, unfortunately that's metal. So I either have to notch the adapter plate and ruin one of the alternate mounting holes, or shim it with washers.

This kind of thing irritates the fire out of me.
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Old Feb 26, 2012 | 03:06 PM
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If it was easy anybody could do it. I guess that's why they call it car crafting. How about cutting the hump off the mount?
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Old Feb 26, 2012 | 03:26 PM
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If it's a common issue, then I'll either shim it or try to grind the mound off. Just wanted to be sure I wasn't misisng something. Thanks.
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Old Feb 26, 2012 | 05:03 PM
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On the Energy Suspension poly mounts, that piece is plastic/poly. I cut it off. You might consider the poly mounts anyway.
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Old Feb 26, 2012 | 05:37 PM
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Found a set of poly mounts that are completely flat on the back, so I bought those...should have them in a couple days.

Thanks guys.
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