Oil filters that attach vertically to the engine have English threads. The filters that attach to the 90 degree filter adapter have metric threads. All vortec 5.7 engines are interchangeable(from 96-02). I've removed oil coolers on some 4wd trucks and ditched the adapters and used a shorter filter for differential clearance.
You can have your current transmission rebuilt. If you are in a pinch you can get a used one from a 96 or early 97(if it has a removable torque converter cover). You can use a late 97 or 98 if your current truck has a 1 piece removable bell housing.
The first 4 numbers indicate you have a 97 4l60e, so it may be original.
http://67-72chevytrucks.com/vboard/s...d.php?t=550122