I have done cars and watched others do cars for 45 years. What I described is how 90% of them are done.

Don't make this any more difficult than it has to be. When's the last time a civilian changed a damper?

OP, please post the Engine ID information. I, at least, am curious.

R.

I bet you'd be hard pressed to find a completely stock 440 that ran at all to do this install that you've watched happen for the last 45 years?
If it was the case He could just look at the damper and the convertor and Know what he had.
Apparently its not that easy.
Civilian? What are you even saying?

Good-bye.
R.

Check the balancer and the convertor for a mismatch.
Like has been mentioned earlier.
You can check the numbers on the block but Ive built many motors and used blocks that had both style cranks. They always ended up forged after I was done with them.
That is my original point..

I will get some info posted as soon as I see my buddy again. Thank you all!