1971 340 block numbers questions
#2512380
06/23/18 11:33 PM
06/23/18 11:33 PM
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Joined: Jan 2012
Posts: 140 Akron, ohio
76orangewagon
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OP
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Joined: Jan 2012
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Akron, ohio
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I have been looking for a date correct 1971 block for my SPD April 30th 1971 Cuda. My buddy from Pennsylvania sent me pictures today of a 1971 block that he has... the casting number was definitely in the ball park for a Mounds Rd engine including hints of the Corporate Blue paint but when I asked him for the numbers under the numbers below the #1 cylinder, this is what he sent me. Can anyone here help me decode the Two lines, it looks like the first line has light stamped 3,6,8's or 0 and then a 2 on the first line and the second line reads MH 340 R (Regular Fuel) or P (premium Fuel)I believe, MH could be M=Mounds Rd and the H would be 1972 assembly but usually the year proceeds the plant from my experience, like GM for 71 Mounds Rd or FW for 1970 Windsor. The last Picture is the current May 1st 1970 engine I currently have for the car which looks nothing like his block numbers.
Last edited by 76orangewagon; 06/23/18 11:35 PM.
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Re: 1971 340 block numbers questions
[Re: 76orangewagon]
#2512408
06/24/18 12:27 AM
06/24/18 12:27 AM
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Joined: Jan 2012
Posts: 140 Akron, ohio
76orangewagon
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OP
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Joined: Jan 2012
Posts: 140
Akron, ohio
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Since I am looking for a date correct block would it be to far off to use since it's a January 1971 Mounds Rd casting. Once painted all that would be visible is the casting date not the final assembly date. I would like to build a date correct 340 with lighter forged pistons and connecting rods and since the heads are X heads I'm looking to build a set of "J" heads which would be correct for the 71' year build. I have a great running May 1st, 1970 engine and I am not looking forward to spending more money for changes that the majority of people will never even notice but I feel the car is worth the effort .
Last edited by 76orangewagon; 06/24/18 12:39 AM.
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Re: 1971 340 block numbers questions
[Re: 76orangewagon]
#2512563
06/24/18 01:21 PM
06/24/18 01:21 PM
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Joined: Feb 2003
Posts: 3,691 MO
cdp
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master
Joined: Feb 2003
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MO
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I have a late 71 block with a 71 VIN, standard bore. Never was sure of the application or assembly date, or if it was A or E-body.
VIN: 1B4525**
1-27-71 cast date.
Last edited by cdp; 06/24/18 01:29 PM.
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Re: 1971 340 block numbers questions
[Re: cdp]
#2512645
06/24/18 03:52 PM
06/24/18 03:52 PM
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Joined: Sep 2003
Posts: 2,763 Myrtle Beach, SC formerly the ...
340wedge
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master
Joined: Sep 2003
Posts: 2,763
Myrtle Beach, SC formerly the ...
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I have a late 71 block with a 71 VIN, standard bore. Never was sure of the application or assembly date, or if it was A or E-body.
VIN: 1B4525**
1-27-71 cast date.
That is interesting and makes sense. My 1-19-71 block is matching numbers and my VIN: 1B452494
1971 Sassy Grass Green Duster 340 2006 Charger Daytona GoMango
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