4-Speed from a 340 to a 318 pilot bushing question

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69GT

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I wrote a post last fall about selling my 1970 340 Dart Swinger without the 340 (non-matching) that is in it. I plan on putting the 340 in my 71 Duster which currently has a 318. I had wanted to do that before last winter set in but wasn't able to get it done so I am now going to finally try to get it done. I am going to pull the 340 soon and either sell the Swinger as a roller or sell it with the 318 from the Duster. My question is, being the Swinger is a 4-speed and the the Duster is an automatic, will the 4-speed bolt up to the 318 as-is or am I going to have to install a pilot bushing in it? In other words, what is the likelihood the 318 would already be drilled for a pilot bushing for a 4-speed? If it isn't, will I have to use a special bushing?
 
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You won't know till you get there. Most cranks back them were drilled for a pilot bushing but yours may or may not be drilled.
 
It could be drilled and not finished honed also.
The only 318 I ever had is one that I built this past winter, it came out of a 1973 Charger. It was not drilled.
In also bought a 72 340 recently that was drilled but not finished.
 
My 2 cents..... not all drilled for pilot bushing.
I’ve sent back from junk yard back in the day a few engines for one with a drilled crank.
 
I have a 1984 318 and the crank was drilled but not finished so I went with the bearing.
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Also make sure you have the correct balanced flywheel. Good luck with your build!!!
 
"Also make sure you have the correct balanced flywheel."

Will the flywheel that is on the 340 be O.K. to use on the 318?
 
"Also make sure you have the correct balanced flywheel."

Will the flywheel that is on the 340 be O.K. to use on the 318?
Yes. with exceptions. 360's are different because they are externally balanced. Do you know how big the clutch is on the 318?
 
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340 and 318 are both neutral balanced....only 340 that was not was last year. 73?
 
Thanks for all the replies everyone. I think I may just sell the car as a roller.
 
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