Linkage set up on 1974 Plymouth duster with 318 automatic

the back edge of the slot on the kickdown rod should be touching your throttle cable pin. it looks as though yours is at the front edge?

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4 barrel throttle cable brackets can be bought at online vendors. Here's one from Mancini Racing

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For the correct 4 barrel upper kick down rod, you'll need to find a member who has one for sale. You can buy reproductions but you have to buy all 3 pieces in the set unfortunately.
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