318 to 340 swap

[wheelman21]

I've read a couple little things here and there but never gotten a straight answer. I have a dart sport 318 and I want to drop in the 340 that I have. What all do I need to do to drop in the 340? I heard all I have to do is change the driver's side engine mount. Is this correct? And what's the best one to get? Any other tips or advice would be great! Thanks guys!

 

[67Dart273]

There always seems to be discussion about this. All I remember is, when I put a 340 into my '70 RR body years ago (318 was only SB offered in B bodies then) I used 318 engine brackets and 4? washers under one bolt.

When I went from 360 to 340 to 318 in my old FJ -40 Landcruiser, I used the same engine brackets that came on the 360--were out of a 74 Dodge pu. I don't remember any important issue between the engines.

 

[70aarcuda]

the 273/318 and 340/360 use a different engine bracket on the driver side of the engine..

the 318 bracket is wider then the 340 bracket...you can put a spacer or stack of washer to shim the 318 bracket to work on the 340/360..

 

[wheelman21]

The 340 is currently in a J-bod. Think I can use the same mount, but in the Dart?