The new intake and throttle body won't add much of any hp, so he's wrong about that causing problems. On the other hand, the AOD is known as a relatively weak tranny. The first major mods you should do to those cars is beef up the tranny so you won't be spending money down the road fixing them.
Sides, a converter, shift kit, and 4.10 gears will probably drop you nearly a second in your ET.
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