My 1969 M Code 440 Dart GTS

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George Greene said:
The internals for the RB 440 HP's were all the same. The bosses were also common but only the M Codes got drilled and tapped. Having said that, some C body big blocks had drilled bosses too. The left side exhaust manifold is peculiar due to the raised block (RB) and slightly different to the 383 B block (B) which was used in the 383 cars. Also the oil pan was different since the engines set lower in the crossmember so as to give top side clearance for the air cleaner. There is a "notch" in the front of the pan so the tie rod could clear when turning. The 383's and 440's got a beefier idler arm, more weight from the bigger motors. There were some other oddities but I won't go on. Hope this helps.
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Any idea what idler arm replacement this would be for 1969 Dodge Dart 440 M-Code?
 
George Greene said:
The internals for the RB 440 HP's were all the same. The bosses were also common but only the M Codes got drilled and tapped. Having said that, some C body big blocks had drilled bosses too. The left side exhaust manifold is peculiar due to the raised block (RB) and slightly different to the 383 B block (B) which was used in the 383 cars. Also the oil pan was different since the engines set lower in the crossmember so as to give top side clearance for the air cleaner. There is a "notch" in the front of the pan so the tie rod could clear when turning. The 383's and 440's got a beefier idler arm, more weight from the bigger motors. There were some other oddities but I won't go on. Hope this helps.
Click to expand...
Your slightly wrong on the motor mount bosses for the 440 drivers side. Chrysler drilled and tapped the bosses in front of the block by the oil pump. I think you might be thinking of the two bosses that appear on the outside of the front cylinder wall some of the B and RB blocks.
 
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