DR HEMI said

You are not damping or insulating anything from vibration here.



The insulators need to be under the weight of the (engine) plate.

I would NEVER use a motor plate on a street driven car unless the driving
only consisted of finding a race and then carrying it out.

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I never understood the aversion to a motor plate. Almost every incident of someone I have run into that hates them, has never used one, or even ridden in one for any length of time. The whole vibration issue is greatly exaggerated, you might feel a LITTLE more vibration at idle, as soon as the revs come up, it is gone. Motor plates are just different than the norm, and some people can't accept that.

I drove one, a 383/727 in a '72 Valiant as a daily driver for 4 years, over 80,000 miles. I live in Vt. so that included beating it through mud season, and winter, plus track trips. I never lost any fillings from my teeth, and guess what? it never broke like so many factory rubber mounts have for me. I love motor plates, and prefer them 100% over a factory mount in anything other than a resto.

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