industrial slant question or two

Industrial slant 6....one popped up for sale near me. Refreshed top to bottom internallyincluding paint and still on the pallet from the place that did them at the time. Late 70s or so.

Now, for. What I read the block is the same. Accessories from my car would need to be swapped. The crank hub on the back looks like it was around 1.5 inches from what my crappy tape measure could read. I'd assume it's a no go for my 71 valiant as this is an older engine then and I need the bigger hub for my 904. He only wanted 400 bucks....