3400 heads

[bszopi]

No, as the 3500 wasn't introduced until 2004.

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[mickaz]

I will start a new post in the engine swap section.

[Shane]

Ok let me know when you do and what it's called or post a link to it. Thx.

[kprower]

I have been searching for where the cylinder head cast numbers are on a 3400. I found some cast numbers listed here such as: 24507487 or 24507577. But, when I looked at my 2004 Grand Am, and another I found: 12580234 or 1258023.GA cast number.jpg Does this seem/look right?

[kprower]

Just found this from Engine Builder Guide TechSolutions Guide: General Motors.
Cylinder Head Replacement for 1996-2005 GM 3.4L VIN E Engines
"Any time you are replacing a cylinder head on 1996-2005 GM 3.4L VIN E engines the following information should be reviewed.
To date there have been two different rocker mounting bolts used to secure the non adjustable rockers to the cylinder head. While the cylinder heads are otherwise interchangeable, the rocker arms and bolts may not be. There is at least one cylinder head casting number that has been manufactured with both 8mm and 10mm rocker bolt holes. A list of casting numbers to assist in identifying which head is required.
Head Casting Number / Bolt Design / Rocker Arm Part Number
24507487, 12568234, 12580234 / 8mm / 12576628
24507487, 10218170 / 10mm / 24504436"