Pontiac Bonneville 400 engine for 79 Firebird

[JJS94]

Hey guys,

I'm currently looking to find an engine to rebuild which will end up in a 79' Firebird.

I have found a 400 CI engine currently sat in a 1967 Pontiac Bonneville. It turns over but is in need of a complete rebuild. Externals appear totally stock. Is this a good choice or should i perhaps be looking at the smaller 350?

Also is there anything specific that i should be watching out for when buying? The engine has seen better days and is going for $600.

I also Understand the motor mounts are different on later models? Problem or not?

Worth it considering as I will be importing to the UK?

I have a feeling it wont be hanging around very long so a reply asap would be much appreciated : )

cheers,

Josh

[Blue Bowtie]

The external dimensions of the 400 are the same as the 350 (it was only 326 CI in 1967). The Pontiac V-8s had fairly stout crankshafts with large journals, and as such were reliable. Architecture is similar to a Chevrolet V-8 from the oil pump and lubrication system to the timing drive. The intakes were all of the air gap variety and thus used a stamped steel valley pan to cover the lifter/pushrod area. Intakes are difficult to acquire compared to other engines. If the stock intake is designed for a four barrel carb it would be more desirable. It would also be best to get a complete engine with all accessories since finding accessory drives and brackets would be difficult, and even more difficult in the UK.

Engine mounts are not difficult to adapt.

https://www.yearone.com/Product/1967-81-firebird/tb389

[JJS94]

Originally Posted by Blue Bowtie

The external dimensions of the 400 are the same as the 350 (it was only 326 CI in 1967). The Pontiac V-8s had fairly stout crankshafts with large journals, and as such were reliable. Architecture is similar to a Chevrolet V-8 from the oil pump and lubrication system to the timing drive. The intakes were all of the air gap variety and thus used a stamped steel valley pan to cover the lifter/pushrod area. Intakes are difficult to acquire compared to other engines. If the stock intake is designed for a four barrel carb it would be more desirable. It would also be best to get a complete engine with all accessories since finding accessory drives and brackets would be difficult, and even more difficult in the UK.

Engine mounts are not difficult to adapt.

https://www.yearone.com/Product/1967-81-firebird/tb389

thanks for all the info