[stevejLT4]

Can someone tell me what the specs/part # for the Gen I Crate Motor (Block cast # 10243880, Head cast # 10147898). I contact Chevrolet and they say I need a part # for the motor before they can tell me what it is. Online all I can find is it is that it's a Gen I Vortec Truck or ZZ4. I need to know the balance (int/Ext) and whats the parts that make up this motor. I bought it from an individual and it's new/never installed. Also it has the LT4 kit installed. I have a set of Edelbrock HP aluminum heads and I want to make sure when I change the top end that I have the proper springs and pistons for the .525 cam lift.
Thanks Steve

[zildjian4life218]

did the crate engine come as a short block or long block?

[Plaintoast]

880 block is a common vortec block, one piece rear main seal, so it's external balance.

[zildjian4life218]

if it came as a short block like this http://www.summitracing.com/parts/NAL-12561723/ its internally balanced.

[stevejLT4]

Originally Posted by zildjian4life218

did the crate engine come as a short block or long block?

It was a long block

[zildjian4life218]

without a gm part number its hard to tell exactly whats inside cause GM performance parts make a couple variations of the zz4 crate engine. like plain toast said the 880 is a vortec block that came with vortec engines.

[stevejLT4]

Originally Posted by zildjian4life218

did the crate engine come as a short block or long block?

Long Block