What size are motor mount bolts?

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Originally Posted by WIDESIDE72

I bought a set of SBC mount/ cushions on eBay a few years ago and on of the holes that is used to attach them to the frame stand was 3/8" thread and the other was 7/16"! Talk about frustrating! Of course the next day I had to go buy a 7/16" bolt since I didnt have a single 7/16 in my "magic bolt bucket"!
Posted via Mobile Device

I stopped by a friends house yesterday and he was having trouble getting the bolt in one of his rubber mounts. After looking at it with a mirror I told him to try a 3/8" bolt in it... went right in. He just bought both mounts at the same time and one of them was 7/16" and one was 3/8". Go figure.

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