318 to 340, 904 trans.

fishy68 said
Is it

Option 1: the original 904 that's 40 yrs. old and never been touched or is it

Option 2: rebuilt with quality parts and a good shift improver kit?

If it's option 1, no, it won't last long

If it's option 2, yes it should if it was done right

1. It's the original just rebuilt. 1969
2. I'm not sure I told him a 340 was going into it and ask him to beef it up if he could so I'll ask him again what he did to it next time I see him.