Re: 1964 GMC 3/4 ton build :D
That's interesting. I did not know that the 8.1 had provisions for the earlier engine mounts.
I don't mean to pee in your Wheaties, but I would not use that style engine mount with that engine. I doubt those will stay together long with the torque output of that engine. If those engine mounts come apart, and they will, the engine will be free to jump around. I much prefer the '73 and up engine mounts. They are a much stronger design, and will not allow the engine to move very far. To install the '73 + mounts, all you need are the frame brackets from a '73-'87 C20 or C30. Then the 'clamshell' that bolts to the engine , the thru bolts and the engine mount itself.
I bought some of those same lighted pushbutton switches on ebay a while back, for future uses.
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