248 v 320 Manifold dimensions

[DavidNA]

I have just found a set of original twin carb manifolds from a 1941 Buick, I have a couple of questions and need some assistance.

The guy who has the manifolds for sale originally advertised as being for a 1937/41 Buick, and small print said big Buick so 320 cu in, however he now reckons it is fact for a small buick, as that is what I will shortly have

I have just bought a 1940 Buick 46 Coupe - 248, but will not collect for a couple of weeks or so, and therefore cannot measure the overall length between the outer studs.

Here are the dimensions I have for the manifolds

“Overall length is 31 half and inside stud face is 15 half end to end and there total 13 bolts which is for smaller straight 8 motor”

Is that eleven studs and two locating pegs ?

I attached a pic , and would very grateful if someone could kindly let me know which engine the manifolds belong to, or the relative manifold dimensions for the 248 and 320 cu in engines

Regards

DavidA

[Grandpa]

Hi David,

The overall length of the assembled intake & exhaust manifolds for the 320 engine is about 34½ inches.

Grandpa

[DavidNA]

Thanks Grandpa, looks like the 3'' difference could make it for a 248 engine

David

[Grandpa]

David,

More info. - - -

For the Buick 320 engine in my 1941:

• The front exhaust manifold has casting number 1317611-1

• The rear exhaust manifold has casting number 1317612-2

Grandpa

[1939_Buick]

Overall length of 31.5 inches is what my 248 ci manifold is

From center of no 1 exhaust to center of no 8 exhaust is 28.25"

Edit:

The 320 has a head length of 34 1⁄2" while the smaller engines are 31 1⁄4" long.

http://en.wikipedia.org/wiki/Buick_Straight-8_engine

Edited April 27, 2014 by 1939_buick (see edit history)

[DavidNA]

Thanks for the 248 dimensions, I have the manifold numbers being 1320385-1, 1 and 2, I think that confirms as being a 248 manifold

Thanks for all you assistance

Regards

David

Edited March 7, 2012 by DavidNA (see edit history)