Shaker,
Any of the parts houses as OEM replacements you. The come with a backing plate as well. However, I will also chose to place a larger plate in the panel as well to spread out the load, 1/8" piece of flat aluminum, no real weight added. Other than a straight nut and bolt application to secure, you can choose you use caged nuts.

I have the factory accessory installation manual and can scan you the page if you need it, just pm me and put in a message so I don’t think its junk mail.

1960 GMC 305A V-6 Gallery Page
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