Any advice on 727 install?

Mark340 said

It's a 1971 high compression motor that came with the car when i bought it in 1982 or so. original motor came apart and dealwr put thos one inand sold it to me.

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It should be a steel crank then, if you are saying it still has the earlier 71 engine. But considering a dealer worked on it I'd confirm. There was a change over to the low compression engine around mid '71. If you mis-match converter balance you'll be taking apart again.