buick engines... how do i tell the difference?

how do i know if i have a buick 350 or a 455?

 

Try here.
http://www.v8buick.com/

 

btt

 

You just look at it...if it's huge, it's a 430 or 455. If it's not very big, then it's a 350.

you might try going to google.com, click "images", then type in

buick 350 engine

and then try it with 455. maybe that'll help?

 

350's and the 400-430 & 455 look very similar and it's easy to make a mistake.

One failsafe way, and it's easy is to look for three 1" high cast in numbers on top of the bellhousing area above the flywheel/flexplate.
These can be seen most times with the engine in the car.
Bring a flashlight.

I've seen these numbers on 430's and 455's, but am not sure if they are on the 400.

There's also a set of cast in numbers on the block sidewall behind the starter.
These are about a 1/2" high.
If I remember right, these numbers are upside down.

If you do the bore and stroke measuring bit, the stroke on the 430 and 455's is the same so you'll need a head removed so you can measure the bore.