Changing engine mounts with engine installed

JDMopar said

If you take the metal brackets loose from the block ears, it will give you more wiggle room and you may not have to jack it up as far.

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I swapped the 318 mounts on my 340 this way. I don’t remember taking anything but a few distributor wires off. I found a piece of wood that made contact with every oil pan bolt on one side of the pan and used a floor jack and a short bit of 2x4 to push up on the oil pan bolts. One side at a time. I think my headers are smaller than TTI’s however ?? Good luck