Does this mean on a 68 and up will swap without hiccups?

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Clarify the question, please. 68 and up "what" to "what"?

904 trans
A 68 up converter will fit a 68 up trans. A 68 up converter will not fit a 67 down trans. A 68 up converter/trans will not fit a 67 down engine. A 67 down converter/trans will fit a 67 down engine, A 67 down trans/converter will fit a 68 up engine, if a crankshaft adapter bushing is used.

727 trans
Same as abouve, except The 727 trans/converter of any year will not fit the 67 down engine without the factory adapter, which are hard to find.

I think I have that all correct.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

I think you got it. I was looking at a local ad for a 68 engine and wanted to put it in my 80 truck, 3speed with overdrive in the truck now engine ok but red the older ones came with more power stock.

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Portland torque said they could cut up my 69 converter and make it work between the 66 engine I have and my old 69 727 auto. I dropped it off today and they quoted me 250$. Well see if it all fits together when there done.

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Van - PDX

69 A108 8 door panel, 225 super/6 - auto 727
84 V65 Honda Sabre
86 Yamaha TT 650

Good-Fast-Cheap
Pick any two

I just had a custom converter made by Midwest converters for $225 with shipping and a 2400 stall. I have not put it in yet but it sounded like a decent deal.

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1967 Dart GT Super 6