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The older 454 TBI used a regular manifold with a goofy adapter. The Edelbrock manifold does away with the adapter. :D

Not sure about the ECM, but nearly every other sensor is the same. The throttle body is bigger.

Best bet is to find a 454 TBI setup complete if you can. I haven't seen any numbers out of the aftermarket to justify the relatively high cost of TBI stuff, so just run it stock and see how you like it. :D
 
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