Okay here's the real deal; the case changed along with the valve body somewhere around 71 , and there is a problem if the vb doesn't match the case. Later vb and cases have extended casting behind the acummulator right in front of the rear band servo. I think the break point in the PK number is around 36XXXXXX. Bigger numbers for later years. If it's a 3600000or higher, I find a wider direct drum bushing and journal along with a PTK part throttle kickdown; along with the aforementioned case and VB changes. I used to rebuild any trans/vb combination, but no longer. Usually it's a newer case with an older vb. I guess somebody robbed the vb long ago for the ptk. I tell them, sorry no can do; a different case or a different vb. So your vb will NOT have an aluminum tube on top of it connecting parts of the castings; cuz that's a lock up vb. And make sure the vb has the extension to match your case.
