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Old 04-24-2007, 05:21 PM
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Please help - Identifying my engine

OK. I looked for the engine ID # for years with no luck, just found it today. The casting # is 3970010. Does anyone know what size motor, year, and/or horsepower it is? Thank you for all replies......

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Old 04-24-2007, 05:32 PM
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This casting number matches blocks used for the 302, 327 and 350. You are going to have to get more data, like the numbers from the heads or the car it came from.

Just google "engine" and the casting number and you will find many sites with this casting number listed.

Bruce
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Old 04-24-2007, 05:38 PM
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GM produced millions of "010" blocks and used them in just about everything they built, from trucks to smog motors.
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Old 04-24-2007, 06:38 PM
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I have the same block in my Nova. As somebody mentioned, that casting number is pretty common. If I remember correctly, it was cast from 1969 up through 1980.
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Old 04-24-2007, 06:54 PM
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Thanks for the responses. I will pull a valve cover tomorrow to get the casting # off it. I do know that it has very high compression. When I first got the car, I blew 3 diffrent starters (2 of them new) before I finally put a hi-torque mini starter on it. It also has a hydraulic cam. I have put a Holley Street Dominator intake and Carter AFB carb on it as well. It feels like the motor has about 350 + horses and about as much in torque. BTW, it is backed by a BW super T10. All this in an 82 Trans Am. Very fun to drive...........
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Old 04-25-2007, 02:38 AM
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your block is a very desireable block to have as blocks go.under the timing cover and possibly over the oil filter location you will see a ( 010 & 020 ) it means the block was made with 1% extra tin and 2% extra nickle.the tin is used to help the molten metal to flow into the casting mold and the nickle helps to make the cylinder barrels harder and more durable.a single 010 or 020 on other blocks means 1% or 2% extra nickle.performance minded people look for these blocks to build on.
you need to get the crank number or the number from the front#'s boss on the pass. side of motor under the alternator to figure out the size of your motor.
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Old 04-26-2007, 07:18 PM
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check mortec...lots of casting info
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