I was thinking about this the other day, could you make a plate to go over the original mounting area for the OEM vacuum pump, but bring the "power" out through a shaft and have it drive something like a vacuum pump from a early 7.3 ford diesel? then maybe still use the electric for low vacuum, like at idle, if needed?

other than that, i would guess maybe going to a serpentine belt setup so you can stack all the stuff close together

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"NEW" 1984 300D TD needs some love