A 1970 case does not have this orifice. my 66-67 case does. Should I remove this orifice with a tiny pin hole in the center? Located about 1-2 inches left from the bottom center of the case looking into the bell housing. Need to know, please. I think it is switch pitch related and I no longer have a switch pitch. Hope it does not interfere with fluid flow on a fixed stator setup.
That sounds like it is for a switch pitch. One of the case holes gets plugged and it has a small hole. I think I remember guys using the end of a glass fuse for a plug when converting to SP.
no issue Gary... GM actually deleted that whole area of the casting in later years. Only required for VP operation. JW
That's exactly where the orifice is. Thanks. The case tag says 66 BU, but is a 67 and up BBB bolt pattern.
I bet your right. My 66 BU apparently was from a LaSabre which had the st400 tranny and had a 340 engine. Also had the correct bolt pattern to fit the small blocks and the upcoming big block 400-455 engines. Thanks guys.