C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Need Motor Info

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Old Apr 12, 2007 | 09:47 PM
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Default Need Motor Info

I have no markings to go by accept a sticker faded with 5.7 liter on it.What other way is there of telling what motor and horse power my 89 c4 has
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Old Apr 12, 2007 | 10:28 PM
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stock is a l98, 240 hp 340 tq
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Old Apr 13, 2007 | 12:34 AM
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89 had 245hp if a coupe, 240 if a Vert
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Old Apr 13, 2007 | 05:43 PM
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Default what engine

You have to learn to read backwards first.
Got it down pat?
Ok, get a mirror, move the spark plug wires a little at the back of the block, use a flashlight, and point it down.There's a casting number on the part of the engine on the top of the bellhousing flange. you should see 5.7 cast into the block back there also.
If there's a little cast in tag that says made in mexico, it's a replacement engine, and all bets are off except it is a 350 block.
To determine the heads, pull a rocker cover, and look for the casting numbers at or near the valve spring bases. the last three numbers gives the head type.
Call Chevrolet, and ask them what the casting numbers fit.
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Old Apr 13, 2007 | 06:03 PM
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you can check casting# here. http://www.mortec.com/
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