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Do the front springs and motor mounts need to be replaced when replacing a Pontiac 301 engine with 350 or 400 455 for 1979 firebird espirit?

It is not necessary to replace the front springs or motor mounts when replacing a Pontiac 301 engine with a 350, 400, or 455 in a 1979 Firebird Esprit.

However, it is advisable to inspect the existing springs and motor mounts for wear or damage and replace them if necessary.

While the weight difference between the 301 and the larger engines is not significant enough to necessitate an automatic replacement of these components, it's worth noting that the increased torque output of the larger engines may put additional stress on these parts.

If you observe any signs of wear, such as sagging springs or cracked motor mounts, it is best to replace them to ensure optimal performance and longevity of your vehicle.

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