One more caution -
just in case you decide to buy a core engine off craigslist tomorrow -
Stay away from 400 engine blocks with Part Number/Casting Number that have a lot of 5's in the part number.
Forgot the exact part number.
And forgot the date ranges too.
Think its 1975 and 1976
Regardless - that specimen is the only bad specimen , and the only specimen with numerous 5's in the number.
So just remember the 5's.
Number located along bellhousing-to-block flange.
1979 4.4.4. TA's are such great cars, they just really need more juice.
Everything else about them is just right.