Slant 6 engine number identification.

I read this post with interest, I'm one of those that own a SL6 '70 Dodge Challenger, I purchased it from a Dodge dealership, as a trade-in w/ 40K miles on it in 1973. Used it as a daily driver and go to work car up until about 2005 culminating with 562K miles on it now. 3 engines, 2 trans. And 2 rear ends. The last engine I bought from the same dealership I originally bought the car. A '77 model engine, they found it in the mid-west, in a warehouse it was slated for a military vehicle, never had been in a car, this was in 1998. Go-Mango exterior color ( always has been ), 904 (auto) and 8 3/4, 742 case, 3.23 gear set. Black SE interior, rallye wheels. Not one single major accident since I've owned it. It's still a beautiful car, looks as good now as when I drove it off their lot, and I still own it.
Thanks, Al

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