The biggest question is, do you have the time to spend, not the time you think it is going to take, but probably 2, 3, or 4 times the amount of time you think it will take. In the end if you want ot do it, go for it.
It looks like a car oil pan. In 1976 it could have been in a cop car or truck/RV.
https://www.440source.com/blocks.htm
https://www.440source.com/oilpans.htm