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Rod...from a Chrysler?
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5,985 Posts
Check the back of the block behind left cylinder head for a casting number or a number such as 5.7.

524821
 

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I will endevour to persevere
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1,157 Posts
My quick look on google gave me the following information about Chevrolet casting comes back to this, CHEV 8.1L /496 02-04 ENGINE. this I copied from my quick search

CHEVY 8.1/496 02-04 ENGINE VIN #G. 4 BOLT MAIN, BLOCK # 12558110, HEAD # 12558162, CRANK # 430, CAM GEAR CASTING NUMBERS LAST 3 ARE 872 OR 762

The other numbers may or may not apply to your engine but it looks to me like it is a 496CI motor.

Google is your friend in these matters...:cool:
 

·
Rod...from a Chrysler?
Joined
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5,985 Posts
The 8.1 is different from all the other BBC engines out there. Not much in aftermarket parts and I'm certain they will be large.....$$$

GM 8.1L Vortec V-8 Engine Specs (Vortec 8100)
Engine:General Motors Vortec 8100
Peak Horsepower:330 - 340 hp @ 4,200 rpm (truck, van, SUV applications)
Peak Torque:440 - 455 lb-ft @ 3,200 rpm (truck, van, SUV applications)
 
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