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350 small block????
I am just getting started on a full resto on a 56' chevy pick up. I have a chevy small block that i think is a 350. Cast # 3970010 yet i do not know how to identify the year. I know that if it is 68' its a 327ci. this is the first resto ive ever done. please help
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Block dates and casting numbers
Either next to the 3970010 number or on the other side of the block back there, there will be a LETTER and 2 - 4 NUMBERS. LOTS of times the YEAR is just shown as 1 number. For example D13 9 in raised letters/numbers. The LETTER = MONTH
A=Jan B=Feb C=Mar D=Apr ... H=Aug BUT! Sometimes they use I & O and sometimes not. IF not, then they have 24 Letters for Jan-Dec twice. M=Dec and N=Jan P=Feb Q=Mar etc. Then 1 or 2 numbers next to the letter will give you the day of the month and the last one or two numbers separated from the others by a small space will be the year. In D13 9 the 9 could be 69, 79, or 89. That block casting number was used on blocks from 1968 until 1992. And NO, it doesn't have to be a 327. Blocks in 1968 could ALSO have been 350 blocks. In fact, in Prosis, AERA software, 3970010 doesn't show as a 327 number. 327 large journal numbers shown are: 3794460 3914660 3914678 3932368 3932373 3932386 3932388 3933180 3955618 3956618 3970014 3970020 Small journal 327 blocks have these numbers: 3782870 3789817 3791632 3794460 3853174 3858174 3858180 3858190 3876132 3892657 3903352 3908852 3933180 3953512 3959512 |
Originally Posted by MrChevy
(Post 124363)
Either next to the 3970010 number or on the other side of the block back there, there will be a LETTER and 2 - 4 NUMBERS. LOTS of times the YEAR is just shown as 1 number. For example D13 9 in raised letters/numbers. The LETTER = MONTH
A=Jan B=Feb C=Mar D=Apr ... H=Aug BUT! Sometimes they use I & O and sometimes not. IF not, then they have 24 Letters for Jan-Dec twice. M=Dec and N=Jan P=Feb Q=Mar etc. Then 1 or 2 numbers next to the letter will give you the day of the month and the last one or two numbers separated from the others by a small space will be the year. In D13 9 the 9 could be 69, 79, or 89. That block casting number was used on blocks from 1968 until 1992. And NO, it doesn't have to be a 327. Blocks in 1968 could ALSO have been 350 blocks. In fact, in Prosis, AERA software, 3970010 doesn't show as a 327 number. 327 large journal numbers shown are: 3794460 3914660 3914678 3932368 3932373 3932386 3932388 3933180 3955618 3956618 3970014 3970020 Small journal 327 blocks have these numbers: 3782870 3789817 3791632 3794460 3853174 3858174 3858180 3858190 3876132 3892657 3903352 3908852 3933180 3953512 3959512 |
You have a 1969-79 3970010 350 185 low power, 370 high power 2 or 4 main caps car, truck, Vette
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rebuilding my 350 as well, able to tell that it's a "87-95 - Car & Truck 2 & 4-bolt Passenger stick 1-piece seal" but having trouble understanding what this other line of numbers is. The date maybe?... it's on the drivers side, back of the block. Anyone? I1440?
https://cimg8.ibsrv.net/gimg/chevrol...275896e281.png |
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