Hey Gang. I'm trying to figure out what filter I need. The manual says PF-25 or PER-49. It is for a 78 120. The guy at the parts store had no listing for these filters. I got him to search 1978 GM's with 2.5L and he came up with PH-30. It appears to be the same,but I would like to know for sure before I drain and take the filter off.

