Oval or rectangular that is the question 1991 7.4

[2750sx]

I have a 1991 7.4 litre volvo gas engine and was wondering what port configuration my cylinder heads have oval or rectangular. I am looking to install a aluminum intake and need to know. btw it's the 740A

 

[RicardoMarine]

"Remove a valve cover and use

"Remove a valve cover and use the casting number to identify the head.
Go here, scroll down to BB cylinder head casting numbers and click on THAT link!
http://www.vehiclecarhistoryreports.com/chevrolet_engine_numbers.html

Now, from what I see, the 740A is raw water cooled. If this is raw water cooled, you will want the intake manifold with the bronze lined coolant cross over, or you will eventually have corrosion issues.

."

 

[2750sx]

I guess I am going to have to

I guess I am going to have to unwrap the boat. THANK YOU so much for your help.

 

[RicardoMarine]

You are welcome.
Don't o

You are welcome.
Don't over-look the issue of the aluminum manifold if raw water cooled.

 

[2750sx]

are there performance cast man

are there performance cast manifolds available?

 

[el_pescador]

"This is a picture of the stoc

"This is a picture of the stock manifold for the 740A, showing the port configuration.

http://www.volvopentastore.com/Inlet-Manifold/dm/cart_id.867579825--session_id.1 39689373--store_id.366--view_id.325665"