74 Duster, resto mod 6.4 conversion in Australia

Pretty sure the one I saw was a stock deal. But can’t say for sure.

I know the stock A-Body setup was an offset bracket, I had one on my ‘73 that I removed before I dropped the 5.7 in.

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The dr diff one gets the booster up higher as well to clear the valve cover its a b body one designed for a 426