401-425 parts interchange

[kbalser]

Will the top end parts from a '66 401 fit on a 425? I mean heads, intake, exhaust manifolds. I'm fairly new to the nailhead world, but it seems the 425 is basically large-bore 401, right?

 

[Bob]

The 401/425 heads and exhaust manifolds interchange. In the list above there is a link to
"Nailhead Parts Interchange"
It shows you which parts do and don't.

 

[kbalser]

I could be wrong, but the "nailhead parts interchange" shows the interchange between the 364 and the 401-425, not necessarily between the 401 and 425, right?

 

[Bob]

Yes...
You are asking about heads. Yes, they are interchangeable between 401 and 425.

 

[kbalser]

Thank you

 

[MTL-Buick]

I'm fairly new to the Nailhead world , I was wondering if I can put a 1966 401 4bbl intake manifold in place of my 1962 401 2bbl Intake? Basically can I swap the two? Thanks, Guy from the Great White North, Montreal, Canada.

 

[Dr. Frankenbuick]

^ yes you can. You will have to figure out how to hook up the throttle and transmission linkage to the 4 bbl. it may take some fabrication or sourcing of pre 64 linkage and carbs.


Sent from my iPhone using Tapatalk

 

[MTL-Buick]

Thanks Again !!