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which part in this picture I did

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correct, this is what would be on a 89 truck. the TBI is slightly different than a carb rod but it has more to do with hooking to the TBI throttle lever.

there is a spring on the rod at the adjuster that is not in the pic..but it can be used with out it if MIA.

it is called a throttle pressure valve linkage rod. referd to as a throttle pressure rod or kickdown rod.

on most of my trucks I have converted them to a 3-piece linkage for better adjustment ratio when aftermarket carb/intakes combos are used.

I have some of the slide adjusters and slotted flat bars & TPV levers. PM if you need something.