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change from 454 mag 1991 to 496 HO

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Old 03-21-2010, 02:06 PM
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Default change from 454 mag 1991 to 496 HO
I bought a 496 HO for my boat ,there is now a 454 magnum 1991 in, what do I expect to change :wiring? exhaust?
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Old 03-21-2010, 06:24 PM
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Originally Posted by jeromeke
I bought a 496 HO for my boat ,there is now a 454 magnum 1991 in, what do I expect to change :wiring? exhaust?
Everything! It's going to be a big job... the 496 is a completely different engine.
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Old 03-21-2010, 10:08 PM
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Originally Posted by jeromeke
I bought a 496 HO for my boat ,there is now a 454 magnum 1991 in, what do I expect to change :wiring? exhaust?
What year 496 did you get? Digital or annolog harness? I've got a fully stock 10 pin if you need it.
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Old 03-22-2010, 11:23 AM
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I replaced a '97 454 Mag MPI with a 496HO. Pretty much bolted right in. The wiring harness was the same.
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Old 03-23-2010, 02:57 PM
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Originally Posted by endeavour32
Everything! It's going to be a big job... the 496 is a completely different engine.
What all needs to be changed?
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