Big block, early a transmission mount

Here's what mine looks like. Apologies for the poor lighting. It does look 1/2" or so shorter than yours. The top side is pretty tight. I don't use the rubber bumper on top and there appears to only be about 1/4"-3/8" clearance at the peak.

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Thank you thank you thank you! That pretty much answers it. Whether it’s the correct mount or not doesn’t matter, something isn’t right with it. Thanks for not letting me do something stupid and start cutting and welding. I knew in my heart it shouldn’t have been an issue.