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Roller cam???
I picked up 3 blocks today & I need a little more info on them:
BLOCK NUMBERS:
3970010: The guy swore it was out of an 1988 van. He said it was a roller cam but I didnt check yet. It is all fuel injected (EFI). It looks to be an 87 & up motor but everything says it cant be becasue the 3970010 casting number hasn been used since 1981. I will try to get more info later on today.
3970010: He said this was out of a 74 Chevy. Could you give me more info cause I heard this might be a high nickel contenet block.
460776: He didnt know much info about this and didnt know what year. Any help would be great
Thanks,
Jake
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Look in the lifter valley. Roller blocks have 3 tapped bosses running front to rear in the floor. These are where the sheet metal spider bolts on. Also, on the lifter bores, check for being machined flat on the tops. That's where the dog bones ride.
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The 3970010 casting number was used for two sizes of engines:
1968 327 and;
1969 – 79 350.
This casting could have 2 or 4 bolt mains and was used in everything from trucks, to sedans to high performance applications. The numbers on the front pad are the key if you want the specific application (see my answer in your other thread).
460776 is a 305 made between 1976-79. Fairly “vanilla” motor.
Neither of these casting numbers are associated with a roller cam.
As to nickel content, the following is from the nastyZ28.com web site:
"Tin and nickel are two metals that are commonly alloyed with cast iron to improve durability, hardness and heat dissipation. Some production engine blocks have the numbers "010", "020" or both cast into their front face, just above the main bearing bore. (The timing cover must be removed for these numbers to be visible.) If both numbers are present, one about the other, it indicates that the block alloy contains 10% tin and 20% nickel. A single number, either a "010" or "020" represents the amount of nickel and indicates negligible amounts of tin. No numbers, other than the casting numbers that are typically found beneath the timing cover, translates to only minor amounts of tin and nickel being present in the block alloy."
However, cylinder wall thickness should be your primary consideration - and a block with no tin or nickel and thick cylinder walls is generally preferable to a high nickel block with thin walls.
Regards,
Glenn
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I will try to get those over the next couple days. That would be great if you could decode them for me.
Thanks,
Jake
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newer 350 is: V0722TXD
older 350 is: F1109CKL
305: F0416DTY
IF YOU COULD DECODE THEM THAT WOULD BE GREAT.
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newer 350 is: V0722TXD
V = Flint Assembly Plant
07 = July
22 = day of month
TXD = is a 350 manufactured in 1975 used in conventional cab trucks (C-20 to 3500). It was rated at 165 horsepower and was originally equipped with a 4 barrel carburetor. This could be a decent block assembly to build from.
older 350 is: F1109CKL
F = Also Flint Assembly Plant
11 =November
09 = day of month
CKL = is a 350 manufactured in 1973 used in turbo/hydro cars and equipped with California smog control. Potential for a build if you throw everything out except the block.
CKL was also produced in 1975 as a 262 CI motor used in Nova/Chevelle/Monte Carlo – not a great motor in it’s original state (displacement is just too small.. In my opinion.)
305: F0416DTY
F = Flint Assembly Plant
04 = April
16=day of month
DTY = is a 305 manufactured in 1979. It was used in auto transmission full size cars and rated at 130 horsepower originally with a 2 barrel carburetor. This one was truly a “gutless wonder” and a dark chapter in Chevy’s history. 305 is not the best motor to build for big HP or torque, however, they can be built into a "respectable" 250 horsepower engine for a daily driver that sips gas and is dependable.
Regards,
Glenn
